IBM PC Series 300 Troubleshooting Guide
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The IBM PC Series 300 (PC 330, 340, 350, 360, 365, 300GL and 300PL) reports faults through beep sequences and numbered POST error codes. IBM's service procedure for these machines is the Symptom-to-FRU index in its PC 300 Series, 700 Series, IntelliStation Hardware Maintenance Manual, which lists, for each beep or code, the checks and parts to try in order.[1]
Before you start
[edit | edit source]IBM's notes for these machines:[1]
- Install the latest BIOS before replacing any part. A down-level BIOS can give false errors and lead to an unnecessary system board replacement.
- If several error codes appear, diagnose the first one.
- The processor is a separate FRU from the system board.
- Types 6265, 6275, 6285, 6561, 6591 and 6862 (and the IntelliStation types 6865, 6889, 6892 and 6893) start "quiet": no beep, no memory count and no checkpoint display when the POST finds no error. Enable Power-on Status in Setup to see them. A silent start on these types is not a fault.
Setup is entered by pressing F1 when the prompt appears during start-up. Note the existing settings first; running Setup can change a customised configuration.[1]
Power
[edit | edit source]If the power light is off, the fan does not run or the machine will not switch off, IBM checks, in order: the voltage-selector switch; the seating of the power cord, the on/off switch connectors, the system board power connectors and the processor; continuity of the power cord; continuity of the power switch. Then it measures the supply with the cables connected to the board.[1]
| Rail | Limits |
|---|---|
| +5 V | +4.75 to +5.25 V |
| −5 V | −4.5 to −5.5 V |
| +12 V | +11.4 to +12.6 V |
| −12 V | −10.8 to −13.2 V |
| +3.3 V (riser P10) | +3.17 to +3.46 V |
If the voltages are wrong and the cord is good, IBM replaces the supply. Types with the 20-pin connector on the riser (6265, 6275, 6285, 6561, 6591, 6562, 6592, 6862, 6892) have +5 V standby on pin 9, power good on pin 8 and PS-ON on pin 14.[1] Supply ratings are in the maintenance guide.
Beep symptoms
[edit | edit source]A sequence such as 1-2-X means one beep, a pause, two beeps, a pause, then any number of beeps.[1]
| Beeps | Meaning | FRU or action, in order |
|---|---|---|
| 1-1-3 | CMOS read/write error | Run Setup; system board |
| 1-1-4 | ROM BIOS check error | System board |
| 1-2-X | DMA error | System board |
| 1-3-X | Memory module; system board | |
| 1-4-4 | Keyboard; system board | |
| 1-4-X | Error in first 64 KB of RAM | Memory module; system board |
| 2-1-1, 2-1-2 | Run Setup; system board | |
| 2-1-X | First 64 KB of RAM failed | Memory module; system board |
| 2-2-2 | Video adapter (if fitted); system board | |
| 2-2-X | First 64 KB of RAM failed | Memory module; system board |
| 2-3-X | Memory module; system board | |
| 2-4-X | Run Setup; memory module; system board | |
| 3-1-X | DMA register failed | System board |
| 3-2-4 | Keyboard controller failed | System board; keyboard |
| 3-3-4 | Screen initialisation failed | Video adapter (if fitted); system board; display |
| 3-4-1 | Screen retrace test error | Video adapter (if fitted); system board; display |
| 3-4-2 | POST searching for video ROM | Video adapter (if fitted); system board |
| 4 (four beeps) | Video adapter (if fitted); system board | |
| Any other sequence | System board | |
| One long, one short | Base 640 KB or shadow RAM error | Memory module; system board |
| One long, two or three short | Video error | Video adapter (if fitted); system board |
| Three short | Memory | See System Board Memory (p. 276); system board |
| Continuous beep | System board | |
| Repeating short beeps | Stuck key; keyboard cable; system board |
With no beep at all: if the computer otherwise works (on a type that is not quiet by default), IBM's action is the system board. If it does not work, IBM's order is the undetermined problem procedure, then system board, memory, any adapter or device, riser card, power cord and supply.[1]
POST error codes
[edit | edit source]Selected codes from IBM's Symptom-to-FRU index. "X" is any digit.[1]
| Code | Meaning | FRU or action, in order |
|---|---|---|
| 101 | System board interrupt failure | System board |
| 102 | System board timer error | System board |
| 110 | System board memory parity error | Memory module; system board |
| 111 | I/O channel parity error | Reseat adapters; any adapter; system board |
| 114 | Adapter ROM error | Adapter memory; system board |
| 129 | Internal cache test error | Processor; L2 cache; system board |
| 151 | Real-time clock failure | System board |
| 161 | Bad CMOS battery | Run Setup; CMOS battery; system board |
| 162 | Configuration mismatch (6562, 6592, 6862, 6892) | Run Setup; check for added, removed or moved devices; power external devices on first; CMOS battery; system board |
| 163 | Clock not updating or invalid time | Set time and date; CMOS battery; system board |
| 164 | Memory size mismatch | Run Setup and check the memory size; run the extended memory tests |
| 166 | Boot block checksum error | Flash recovery using the boot block (p. 228); system board |
| 167 | Processor not supported by the BIOS | Check the stepping and update the BIOS; processor |
| 168 | Alert on LAN error | Enable Ethernet and Alert on LAN in Setup; system board; riser |
| 176 | Covers were removed | |
| 185 | Corrupted boot sequence | Set configuration and reinstall the boot sequence |
| 201, 20X | Memory data error | Memory test; memory module; system board |
| 225 | Unsupported memory | |
| 229 | External cache test error | L2 cache; system board |
| 262 | Memory type error | Run Setup and check the memory type; run the extended memory tests |
| 301, 3XX | Keyboard | Keyboard; keyboard cable; system board |
| 303 with 8603 | Mouse; keyboard; keyboard cable; system board | |
| 5XX | Video | Video adapter (if fitted); system board |
| 601 | Diskette | Drive A; cable; riser (6562, 6592, 6862, 6892); system board |
| 662 | Diskette configuration error | Run Setup |
| 762 | Maths coprocessor configuration error | Run Setup; processor; system board |
| 962 | Parallel port configuration error | Run Setup; parallel adapter; system board |
| 1162 | Serial port configuration error | Run Setup; serial adapter; system board |
| 1692 | Boot sequence error | Run FDISK and make sure one partition is active |
| 1762 | Hard disk configuration error | Run Setup |
| 1780–1783 | Hard disk 0 to 3 | Check the supply; hard disk; riser; system board; cable; supply |
| 180X, 188X | PCI configuration or resource error | Check PCI/ISA settings in Setup; set ISA adapters "not available"; remove suspect ISA adapters; PCI adapter; riser |
| 1962 | Boot sequence error | Hard disk boot error checks (p. 249) |
| 2401, 2402 | Video | Display if colours change; otherwise system board, then display |
| 2462 | Video memory configuration error | Check cables; run Setup; video memory; video adapter; system board |
| 5962 | IDE device (not a hard disk) configuration error | Run Setup; CD-ROM drive or other ATAPI device; system board |
| 86XX | Mouse | Mouse; system board |
| I999030X | Hard disk reset failure | Hard disk boot error checks (p. 249) |
For 1962 and I999030X, IBM's checks are that the start-up drive is in the boot sequence in Setup, that an operating system is installed on it, and that the boot sector is intact; a corrupted boot sector means backing up and reformatting the drive.[1]
Undetermined problem
[edit | edit source]IBM's procedure when the index does not identify the fault:[1]
- Check the supply voltages.
- Switch off, and remove or disconnect one at a time: non-IBM devices; external devices; adapters; the riser card; memory modules; extended video memory; external cache; the hard disk; the diskette drive.
- Switch on and retest after each removal until the failing part is found.
- If the fault remains with everything removed, replace the system board.
IBM warns that non-IBM devices can cause false errors in its diagnostics; if removing one clears the symptom, that device is the fault.[1]
BIOS recovery
[edit | edit source]If a flash update is interrupted, the BIOS may be unusable. Move the system board boot-block jumper or switch to the recover position, boot from the update diskette, complete the update, then return the jumper to normal. The jumper location is on the label inside the cover; the PC 360-S150 (6598) has its own recovery procedure.[1] A 166 error calls for the same recovery.
Capacitors
[edit | edit source]Electrolytic capacitor failures on these boards are covered in IBM PC Series 300 Capacitor Replacement Guide.
Related pages
[edit | edit source]- IBM PC Series 300
- IBM PC Series 300 Maintenance Guide
- IBM PC Series 300 Capacitor Replacement Guide
- IBM IntelliStation Troubleshooting Guide
References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 IBM, IBM Personal Computer 300 Series, 700 Series, IntelliStation Hardware Maintenance Manual, S83G-7789-17, Eighteenth Edition, September 1998, hosted as File:IBM PC 300 700 IntelliStation Hardware Maintenance Manual S83G-7789-17 (Sep 1998).pdf. General checkout notes (p. 2); power supply (pp. 28–30); quiet POST (p. 32); beep symptoms and no-beep symptoms (pp. 33–34); POST error codes (pp. 35–49); undetermined problem and processor replacement (p. 81); BIOS levels and flash recovery (pp. 227–228); Setup Utility (p. 248); hard disk drive boot error (p. 249).