IBM 6594 - Manuals

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Related publications The following publications are available for IBM products.For more information, contact IBM or an IBM AuthorizedDealer. For Information About See Publication PC300/700 and IntelliStationcomputers - Volume 1 HMM IBM Personal ComputerHardware MaintenanceManual Volume 1(S83G-7789) ...

Contents About this manual . . . . . . . . . . . . . . . . . iii Important safety information . . . . . . . . . . iii Related publications . . . . . . . . . . . . . . . . vi IBM PC Enhanced Diagnostics error codes . . . 1 PC 300 - 6584/6594 . . . . . . . . . . . . . . . 21 General checkout . . . . ....

Miscellaneous information . . . . . . . . . . . . 337 Send us your comments! . . . . . . . . . . . . 339 Do you need technical references? . . . . . . . . 340 Problem determination tips . . . . . . . . . . . 341 Notices . . . . . . . . . . . . . . . . . . . . . 348 viii IBM PC 300/IntelliStation Vol...

IBM PC Enhanced Diagnostics errorcodes Refer to the following Diagnostic Error Codes when usingthe IBM PC Enhanced Diagnostics test. See “Diagnosticand test information” section for information about the IBMPC Enhanced Diagnostics program. In the following index, “X” can represent any number. Diagno...

General checkout This general checkout procedure is for Type 6584/6594computers. Attention The drives in the computer you are servicing mighthave been rearranged or the drive startup sequencechanged. Be extremely careful during write operationssuch as copying, saving, or formatting. Data orprograms ...

001 (continued)– Insert the IBM PC Enhanced Diagnostics diskette into drive A. – Power-on all external devices.– Power-on the computer.– Check for the following response: 1. Readable instructions or the Main Menu. Note Type 6584/6594 computers default to come up quiet(No beep and no memory count and...

Keyboard Note If a mouse or other pointing device is attached,remove it to see if the error symptom goes away. Ifthe symptom goes away, the mouse or pointing deviceis defective. 001 – Power-off the computer.– Disconnect the keyboard cable from the system unit.– Power-on the computer and check the ke...

Power supply If the power-on indicator is not on, the power-supply fan isnot running, or the computer will not power-off, do thefollowing. Check/Verify FRU/Action 1. Verify that the voltage-selector switchis set for the correctvoltage. Correct thevoltage-selector switchsetting. 2. Check the followin...

20-pin main power supply connection See “System board layout” on page 77 for connectorlocation. Attention These voltages must be checked with the powersupply cables connected to the system board. 1 10 11 20 Pin Signal Function 1 3.3 V +3.3 V dc 2 3.3 V +3.3 V dc 3 COM Ground 4 5 V +5 V dc 5 COM Grou...

Display If the screen is rolling, replace the display assembly. Ifthat does not correct the problem, replace the videoadapter (if installed) or replace the system board. If the screen is not rolling, do the following to run thedisplay self-test: 1. Power-off the computer and display.2. Disconnect th...

Diagnostics and test information The following tools are available to help identify andresolve hardware-related problems: Ÿ Power-on self-test (POST) Ÿ POST Beep Codes Ÿ Error Code Format Ÿ IBM PC Enhanced Diagnostics Power-on self-test (POST) Each time you power-on the system, it performs a series ...

Note Type 6584/6594 computers default to come up quiet(No beep and no memory count and checkpoint codedisplay) when no errors are detected by POST. To enable Beep and memory count and checkpointcode display when a successful POST occurs: 1. Enable Power on Status in setup. See “Setup Utility program...

IBM PC Enhanced Diagnostics The IBM PC Enhanced Diagnostics programs use a fullrange of diagnostic utilities to determine the operatingcondition of the computers hardware components. Theuser interface is WaterGate's PC-Doctor which serves asthe control program for running the IBM PC EnhancedMemory D...

1. Select the DIAGNOSTICS option on the toolbar and press Enter. 2. Highlight either the 'Memory Test-Full' or 'Memory Test-Quick option and press Enter. Ÿ Memory Test-Full The full memory test will take about 80 seconds perMB of memory and will detect marginal, intermittent,and solid (stuck) memory...

Date: Contains the date on which thediagnostic test was run. Date isretrieved from CMOS and displayedusing the YYYYMMDD format. ChkDigits: Contains a 2-digit check-digit value toensure that: Ÿ Diagnostics were run on thespecified date Ÿ Diagnostics were run on thespecified IBM computer Ÿ The diagnos...

Quick and Full erase - hard drive The IBM PC Enhanced Diagnostics Program offers twohard drive format utilities: Ÿ Quick Erase Hard Drive Ÿ Full Erase Hard Drive The Quick Erase Hard Drive provides a DOS utility thatperforms the following: Ÿ Destroys the Master Boot Record (MBR) on the harddrive. Ÿ ...

Ÿ Select Utility Ÿ Select Asset EEPROM Backup Ÿ follow instructions on screen. Viewing the test log Errors reported by the diagnostic test will be displayed bythe program as a failed test. To view details of a failure or to view a list of test results,do the following from any test category screen: ...

Setup Utility program Attention A customized setup configuration (other than defaultsettings) might exist on the computer you areservicing. Running the Setup Utility program mightalter those settings. Note the current configurationsettings and verify that the settings are in place whenservice is com...

Cause Actions The boot sector on thestart-up drive is corrupted. The drive must beformatted, do the following: 1. Attempt to access and recover (back-up) thefailing hard disk drive. 2. Using the operating systems programs,format the hard diskdrive. 3. Go to “Preparing the hard disk drive for use”on ...

Product description The PC 300 Type 6584/6594 computers are available in4 x 5, (Four drive bays, Five I/O adapter slots whichincludes an AGP slot) as Type 6584 desktop and 6 x 7,(Six drive bays, Seven I/O adapter slots, which includes anAGP slot) as Type 6594 micro-tower models. Note Service informa...

Replacing a system board Notes 1. The BIOS and Vital Product Data (VPD) for the computer you are servicing must be installed onthe new system board (FRU) after it is installed inthe computer. To do this, you must run theFlash Update program using the Flash Updatediskette. See “BIOS levels” on page 5...

Administrator password: The administrator password is used to restrict access to theConfiguration/Setup Utility program. If the administratorpassword is activated, and you do not enter theadministrator password, the configuration can be viewedbut not changed. Note Type 6584/6594 has Enhanced Securit...

The customer has the option to purchase serial numberinformation and services from Retain-a-Group. It is thecustomer's responsibility to maintain the MIF file and toinform Retain-a-Group of any changes to the file. Some customers may request their servicers to assistthem in maintaining the MIF file ...

Hard disk drive jumper settings IDE hard disk drives for the PC 300 series computers usejumpers to set the drives as primary (master) or secondary(slave). Attention For drives not shown below, refer to the label on thehard disk drive for the hard disk drive settings. IDE hard disk drive settings .1/...

CD-ROM drive jumper settings CD-ROM and PC/CD-ROM drives use jumpers or tabs toset the drives as primary (master) or secondary (slave).Refer to the drive connector labels or the figures below forthe drive settings. AUDIO IDE INTERFACE See Jumper Settings Below DC INPUT R G G L 5V G G 12V 3940 12 CD-...

BIOS levels An incorrect level of BIOS can cause false error andunnecessary FRU replacement. Use the followinginformation to determine the current level of BIOS installedin the computer, the latest BIOS available for thecomputer, and where to obtain the latest level of BIOS. Ÿ Current Level BIOS inf...

Flash (BIOS/VPD) update procedure Attention Refer to the information label located inside thesystem unit cover for any model-specific information. 1. Power-off the computer.2. Insert the flash update diskette into drive A.3. Power-on the computer.4. When the Update Utility appears; select your count...

Power management Power management reduces the power consumption ofcertain components of the computer such as the systempower supply, processor, hard disk drives, and somemonitors. Advanced Power Management and RapidResume Manager are features of some personalcomputers. Advanced Configuration and Pow...

Set display to be disabled or to be reduced at thesepower states: – Standby: Screen is blank, but can be restoredimmediately when any activity is detected. – Suspend: Monitor uses less power than inStandby mode. Screen image is restored after afew seconds when any activity is detected. – Off: Monito...

Ÿ Modem Ring Detect: With this feature set toEnabled, the computer will turn on automaticallywhen a ring is detected on the internal modem. Ÿ Wake Up on Alarm: You can specify a date andtime at which the computer will be turned onautomatically. This can be either a single event or adaily event. Ÿ PC...

6. Before you exit from the program, select Save Settings from the Configuration/Setup Utility programmenu. 7. To exit from the Configuration/Setup Utility program, press Esc and follow the instructions on the screen. Wake on LAN This setting is used to enable or disable theIBM-developed Wake on LAN...

System board memory The following matrix cross-references the name of thecomputer (printed on the logo) and the size, speed, andtype of memory modules supported in the computer. Note RAMBUS inline memory module (RIMM) is used in thetype 6584/6594 computer. RIMM modules are notcompatible with SIMM or...

Input/Output connectors 2 2 1 1 USB 1 Parallel Keyboard Mouse Monitor Serial 1 Serial 2 USB 2 62 IBM PC 300/IntelliStation Vol 3 HMM

Top and front cover removal PullLatches To remove top and front cover: 1. Pull left and right pull latches forward then pull cover forward. 2. Lift cover up from the chassis. To install top and front cover: 1. Slide cover down onto the chassis about 4-inches (10.16 cm) from the rear of chassis. 2. S...

CD-ROM/hard drive bracket To open the CD-ROM/hard drive bracket: 1. Remove the top cover. 2. Slide the plastic spring loaded cage retainer to the left. 3. Lift the cage up and swing it back to the service position. CD-ROM drive removal To remove the CD-ROM drive: 1. Remove the top cover. 2. Put the ...

Hard drive removal To remove the hard drive: 1. Remove the top cover. 2. Put the CD-ROM/hard drive bracket in its service position. 3. Disconnect the hard drive signal and power cables. 4. Push in on the left and right plastic tabs of the hard drive rails. 5. Pull the hard drive out of the bracket. ...

Diskette drive removal To remove the diskette drive: 1. Remove the top cover. 2. Disconnect the diskette drive signal and power cables. 3. Remove the front screw of the diskette drive cage. 4. Pull the diskette drive out of the chassis. 5. Remove the two side screws from the diskette drive cage. 6. ...

System board removal System Board Rail Tab Tab Latch LiftHere LiftHere PullHere System Board To remove the system board: 1. Remove the top cover. 2. Remove all cables connected to the system board. 3. Remove the AGP card, if installed. 4. Remove the retainer side bracket thumb screw. 5. Swing open t...

Riser card removal To remove the riser card: 1. Remove the top cover. 2. Remove the system board. 3. Disconnect all cables from the front and back of the riser card. 4. Remove the two top screws securing the riser card. 5. Remove the riser card from the chassis. Power supply removal Note 1. Make sur...

Fan and speaker bracket removal Note 1. If you remove the LED/power cable or the RFID antenna cable, make sure it is routed the sameway it was installed. 2. When removing the C2 switch assembly from the fan bracket, use care to pry the switch(alternating at both ends of the switch) from itsmounting ...

Access cover removal Socket 7 Socket 7 Cover-ReleaseTab Unlock cover from back of the system unit before removingcover. Top handle cover removal Attention Do not lift handle cover too high or the tabs will break. 72 IBM PC 300/IntelliStation Vol 3 HMM

Front bezel removal/replacement PC 300 - 6584/6594 73

Tab removal Fan cage, air baffle, speaker/card guideremoval Push in on the latches as shown by arrows to release thefan cage, air baffle, or speaker/card guide. Note After releasing the latch on the speaker/card guide,slide it away from the latch to disengage it from thechassis. 76 IBM PC 300/Intell...

System board jumper settings The following table contains the jumper setting information.(D) indicates the default setting. Clear CMOS/Flash Boot Block Recovery Use the recovery jumper setting to Clear CMOS or toFlash Boot Block Recover. Processor Speed Settings Processor speed for the PC 300 type 6...

Riser cards (Type 6584) Riser card, ISA/PCI, front view Wakeon LAN Speak er T amper PowerLEDs FDDConnector CD Audio PCI1 PCI2 PCI3 Fan RFID Alert on LAN SCSI LED ISA1 System BoardConnector ISA2 Riser card, PCI, front view Wake on LAN Speak er T amper Power LEDs FDD Connector CD Audio PCI Fan RFID Al...

Symptom-to-FRU index The Symptom-to-FRU index lists error symptoms andpossible causes. The most likely cause is listed first.Always begin with “General checkout” on page 24. See“IBM PC Enhanced Diagnostics error codes” on page 1when running diagnostics. This index can also be used tohelp you decide ...

Beep symptoms Beep symptoms are short tones or a series of short tonesseparated by pauses (intervals without sound). See thefollowing examples. Beeps Description 1-2-X Ÿ One Beep Ÿ A pause (or break) Ÿ Two beeps Ÿ A pause (or break) Ÿ Any number of beeps 4 Four continuous beeps Beep Symptom FRU/Acti...

Beep Symptom FRU/Action 3-3-4Screen initialization failed. 1. Video Adapter (if installed) 2. System Board 3. Display 3-4-1Screen retrace test detectedan error. 1. Video Adapter (if installed) 2. System Board 3. Display 3-4-2POST is searching for videoROM. 1. Video Adapter (if installed) 2. System B...

POST error codes In the following index, “X” can represent any number. POST Error Code FRU/Action 000SCSI Adapter not enabled. 1. Verify adapter device and Bus Master fieldsare enabled in PCIconfigurationprogram. Seedocumentationshipped withcomputer. 02X 1. SCSI Adapter 08XCheck SCSI terminatorinsta...

Miscellaneous error messages Message/Symptom FRU/Action CMOS Backup Batteryinaccurate. 1. CMOS Backup BatterySee page “Safetyinformation” onpage 332. 2. System Board Changing colors. 1. Display Computer will not power-off.See “Power supply” onpage 29. 1. Power Switch 2. System Board 3. Riser card Co...

Undetermined problem Check the power supply voltages. See “Power supply” onpage 29. If the voltages are correct, return here andcontinue with the following steps. 1. Power-off the computer.2. Remove or disconnect the following, if installed, one at a time: a. Non-IBM devices b. External devices (mod...

Parts listing Index System (Type 6584) FRUNo. 1 Top and Front Cover Assembly 01K6030 2 CD-ROM (48X Max) 09N0735 3 9.1 GB SCSI 7200RPM Hard DiskDrive 36L8648 3 10.1 GB EIDE Hard Disk Drive 37L5717 3 20.4 GB EIDE Hard Disk Drive 36L8628 4 Hard drive Cage Latch Kit 33L2606 5 1.44 MB, 3.5-Inch Diskette ...

Computer Power Cords Display and Monitor Information Display and monitor information is separately available andis listed under “Related publications” on page vi. Arabic Countries 14F0033 Argentina 36L8880 Australia 93F2365 Belgium 1339520 Bulgaria 1339520 Canada 93F2364 Chile 14F0069 China (Aptiva ...

Test results IBM PC Enhanced Diagnostic test results will produce thiserror code format: Function Code: Represents the feature or functionwithin the PC. Failure Type: Represents the type of errorencountered. DeviceID: Contains the component's unit-id whichcorresponds to either a fixed disk drive,rem...

Product description The IBM IntelliStation Type 6866 computer is available in9 x 7, (nine drive bays, seven expansion slots) four 32-bit,two 64-bit PCI slots, and one AGP slot as a tower modelonly. Security features Ÿ Cover lock and keys (located behind the CD-ROMcover door) Ÿ Support for the additi...

Additional service information The following additional service information supports theIBM IntelliStation type 6866 computer. Ÿ “Replacing a processor/Installing a secondmicroprocessor” Ÿ “Replacing a system board” on page 146 Ÿ “Security features” on page 146 Ÿ “Passwords” on page 147 Ÿ “Vital Pro...

Passwords The following provides information about computerhardware and software-related passwords: Ÿ Power-on Password Ÿ Administrator Password Ÿ Operating System Password Power-on and Administrator passwords are set in theSetup Utility program. See “Setup Utility program” onpage 140 for informatio...

Type 6866 memory Rambus inline memory modules (RIMMs). The IBM-installed RIMMs are ECC (error checking andcorrection) RDRAM (Rambus dynamic random accessmemory) modules. When installing or replacing RIMMs, take the followinginformation into consideration: Ÿ RIMM connectors do not support dual inline...

Memory placement for 4-RIMM Memory Card 2 RIMMs4 RIMMs 2 RIMM C-RIMM 1 C-RIMM RIMM 3 RIMMRIMM 4 RIMMRIMM Note: Memory must be installed in matched pairs. Pair 1 Pair 2 IntelliStation - 6866 159

Removing a RIMM or C-RIMM Attention: Standby power present, disconnect power cord beforeservicing computer. 1. To locate the RIMM connectors, see “System board layout” on page 183 and “Locating components onthe memory card” on page 157. 2. Press the tab on the front fan and push the adapter guide la...

Installing a RIMM or C-RIMM 1. Position the RIMM or C-RIMM above the connector so that the two notches on the bottom edge of themodule align properly with the empty connector. Note Pay attention to the orientation of the notches onthe connectors and RIMMs. Adjacent connectorsmight not have the same ...

Cover removal 1. If the key-lock button is locked, unlock it. 2. Press the key-lock button on the left side of the front bezel and slide the side cover toward the rear of thecomputer. 3. Lift the side cover from the computer. Front bezel removal 1. Lift the lever at the top of the chassis and pull t...

Card guide/fan assembly removal 1. Remove the cover and front bezel. 2. Press the latch tab on the card guide/fan assembly and push the adapter guide latch toward the front ofthe chassis unt il it snaps into place. 3. Disconnect the memory power cable and the hard disk drive fan cable on the memory ...

Battery removal and installation 1. Turn off the computer and all attached devices. 2. Unplug the power cord. 3. Remove the cover. 4. Remove the memory card. see “Removing a RIMM or C-RIMM” on page 160 5. Remove any long adapters installed in the PCI slots. see “Installing long adapters” on page 168...

Installing long adapters 1. Press the tab on the card guide/fan assembly and push the adapter guide latch back to allow room for afull size adapter to slide into the adapter guide on theassembly. 2. Remove the screw and the appropriate expansion slot cover. 3. Install the adapter and screw it into p...

Installing internal drives .1/ Drive bay 1 .2/ Drive bay 2 (CD-ROM drive) .3/ Drive bay 3 (diskette drive) .4/ Drive bay 4 .5/ Drive bay 5 .6/ Drive bay 6 .7/ Drive bay 7 .8/ Drive bay 8 .9/ Drive bay 9 (hard disk drive) Note 1. Install removable-media drives in bay 1.2. Only one diskette drive is s...

Installing a drive in bay 1 Note A 3.5-inch drive into bay 1 requires an industrystandard bay adapter bracket. Note For removable media drives remove the front baypanel. Removing drives in bays 4, 5, 6, 7, 8,and 9 1. Unplug the hard disk drive fan power cable from the connector on the memory card. 2...

3. Remove all cables to the drive. 4. Press in the tabs on the sliding rails and remove the hard disk drive. IntelliStation - 6866 171

Power supply removal To remove the power supply, do the following: 1. Remove the side cover. 2. Disconnect the power supply cables.3. Remove the power supply screws .1/ . 4. Slide the power supply toward the front of the system .2/ and lift the power supply out of the system .3/ . 172 IBM PC 300/Int...

Preparing the rack enclosure Parts needed: Ÿ Two slide bracket assemblies Ÿ Two slide rails (fitted to system unit) Ÿ One cable-management arm Ÿ Ten long screws Ÿ Ten cage nuts Ÿ Installation template Attention To ensure cabinet stability, install computers in therack enclosure starting from the bot...

Note When the computer is fully extended, safetylatches on the slide rails lock into place. Thisprevents the computer from being accidentallypulled out too far and dropped. To release thesafety latch, press in. 4. Press the safety latches and slide the computer about halfway into the rack enclosure....

System board layout 37 35 38 36 33 34 3231 .1/ Second CPU voltage regulator module (VRM) .2/ Power 2 .3/ Power 1 .4/ Hard disk LED .5/ Wake on LAN connector .6/ Alert on LAN connector .7/ Wake on Modem connector .8/ Diskette drive connector .9/ Secondary IDE connector .1ð/ SCSI channel B .11/ Primar...

.33/ USB connectors .34/ Parallel and serial connectors .35/ Mouse and Keyboard connectors .36/ Rear fan connector .37/ Microprocessor 1 .38/ Microprocessor 2 System board switch settings The following table contains the rocker switch settinginformation. Note The default switch settings for the rock...

Keyboards - PCNext Lite Arabic 37L2555 Belgian-French 37L2556 Belgian-UK 37L2557 Brazil/Portugal 37L2554 Bulgarian 37L2558 Chinese 37L2585 Czech 37L2559 Danish 37L2560 Dutch 37L2561 French 37L2562 French/Canadian-ID 058 37L0913 French/Canadian-ID 445 37L2552 German 37L2563 Greek 37L2564 Hebrew 37L25...

Computer Power Cords Display and Monitor Information Display and monitor information is separately available andis listed under “Related publications” on page vi. Arabic Countries 14F0033 Argentina 36L8880 Australia 93F2365 Belgium 1339520 Bulgaria 1339520 Canada 93F2364 Chile 14F0069 Czechoslovakia...

Note Type 6867 computers default to come up quiet (Nobeep and no memory count and checkpoint codedisplay) when no errors are detected by POST. To enable Beep and memory count and checkpointcode display when a successful POST occurs: 1. Enable Power on Status in setup. See “Setup Utility program” on ...

Product description The IBM IntelliStation Type 6867 computer is available in4 x 5, (Four drive bays, Five I/O adapter slots whichincludes an AGP slot) as a desktop model only. Ÿ Security – Administrator password – Cover lock – Power-on password – Operating system password – U-bolt and cable (Option...

The customer has the option to purchase serial numberinformation and services from Retain-a-Group. It is thecustomer's responsibility to maintain the MIF file and toinform Retain-a-Group of any changes to the file. Some customers may request their servicers to assistthem in maintaining the MIF file ...

Procedures to determine memory errors: 1. If a memory error occurs, and the system is operational, run memory diagnostics. 2. If a memory error occurs, and the system is not operational: a. Remove one RIMM module at a time until the system comes up. Note All unused RIMM sockets must have aC-RIMM ins...

Diskette drive removal To remove the diskette drive: 1. Remove the top cover. 2. Disconnect the diskette drive signal and power cables. 3. Remove the front screw of the diskette drive cage. 4. Pull the diskette drive out of the chassis. 5. Remove the two side screws from the diskette drive cage. 6. ...

Fan bracket removal Note 1. If you remove the LED/power cable or the RFID antenna cable, make sure it is routed the sameway it was installed. 2. When removing the C2 switch assembly from the fan bracket, use care to pry the switch(alternating at both ends of the switch) from itsmounting studs. 3. Ma...

Riser card (Type 6867) Riser card, PCI, front view Wake on LAN Speak er T amper Power LEDs FDD Connector CD Audio PCI Fan RFID Alert on LAN SCSI LED PCI PCI PCI Riser card, back view Primary IDE Power Connector Secondary IDE IntelliStation - 6867 271

Related Service Information Safety notices (multi-lingual translations) . . . . . 308 Safety information . . . . . . . . . . . . . . . . 332 General safety . . . . . . . . . . . . . . . . 332 Electrical safety . . . . . . . . . . . . . . . 333 Safety Inspection Guide . . . . . . . . . . . 334 Handli...

Electrical safety Observe the following rules when working on electricalequipment. Important Use only approved tools and test equipment. Somehand tools have handles covered with a soft materialthat does not insulate you when working with liveelectrical currents. Many customers have, near their equip...

Ÿ Regularly inspect and maintain your electrical handtools for safe operational condition. Ÿ Do not use worn or broken tools and testers. Ÿ Never assume that power has been disconnectedfrom a circuit. First, check that it has been powered-off. Ÿ Always look carefully for possible hazards in yourwork...

Handling electrostaticdischarge-sensitive devices Any computer part containing transistors or integratedcircuits (ICs) should be considered sensitive to electrostaticdischarge (ESD). ESD damage can occur when there is adifference in charge between objects. Protect against ESDdamage by equalizing the...

Miscellaneous information Acronyms, Abbreviations and Terms Term Information ACPA/A Audio Capture and Playback Adapter ADP Automatic Data Processing AGP Advanced Graphics Port Alt Alternate ANSI American National Standards Institute ARTIC A Real Time Interface Coprocessor ASCII American National Sta...

Send us your comments! We want to know your opinion about this manual (partnumber 09N8605). Your input will help us to improve ourpublications. Please photocopy this survey, complete it, and then fax itto IBM HMM Survey at 919-543-8167 (USA). Name Phone Number 1. Do you like this manual? _____ Yes _...

Do you need technical references? We have a wide range of hardware technical referencesthat provide in-depth information about IBM personalcomputer products. Our Technical Reference Libraryincludes information about: Ÿ Micro Channel, Setup, and Subsystem Control Blockarchitectures Ÿ Common interface...

Problem determination tips Due to the variety of hardware and software combinationsthat can be encountered, use the following information toassist you in problem determination. Ÿ Verify any recent hardware changes. See “Hardwareconsiderations” on page 342. Ÿ Verify any recent software changes. See “...

Ÿ Software-generated error messages are displayed ifa problem or conflict is found by an applicationprogram, the operating system, or both. For anexplanation of these messages, refer to theinformation supplied with the installed softwarepackage. Also, refer to “Software considerations.” Ÿ Multiple m...

have the advantage of faster throughput, but thedisadvantage of limited error-handling capability andreduced software and hardware compatibility andflexibility. This method is not used in the IBM PCSeries systems. Ÿ Operating system to BIOS to hardware. This is therecommended way. It's the most flex...

IRQ conflicts occur when there are multiple assignmentsto the same interrupt level. If there is an IRQ conflict,the system will hang. Use the systems diagnostics tocheck for multiple assignments to the same interrupt levelbefore replacing any hardware component. DMA: Ÿ Accesses the memory by bypassi...

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Notices References in this publication to IBM products, programs,or services do not imply that IBM intends to make theseavailable in all countries in which IBM operates. Anyreference to an IBM product, program, or service is notintended to state or imply that only that IBM product,program, or servic...

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