Chapter 3 3-23
Troubleshooting
550B Bus timeout error
1. Replace Processor/Memory card.
2. Contact the response center.
550E Error signal from bus converter on
AP
1. Replace Access Port card.
2. Replace system/Core I/O card.
3. Contact the response center.
550F TLB error on IOA
1. Replace Processor/Memory card.
2. May need a software patch for I/O PDIR
corruption.
3. Contact the response center.
Memory HPMCs
7D03 Memory MSI read error (May be due to software problem.)
1. Replace Processor/Memory card.
2. Replace I/O cards.
3. Contact the response center.
7D04 Memory MSI write error (May be due to software problem.)
1. Replace Processor/Memory card.
2. Contact the response center.
7D05 Processor memory bus error
1. Replace Processor/Memory card.
2. Contact the response center.
7D06 Memory write bomb error
1. Replace Processor/Memory card.
2. Contact the response center.
7D07 Memory address error
1. Replace Processor/Memory card.
2. Contact the response center.
7D08 Memory multi-bit error
1. Check the hex code following 7D08.
(Should be 7F0X, where X = slot number)
2. Replace the memory SIMM pair indicated
by the hex code.
7D0A Address did not map to bank
1. This follows another 7Dxx hex code.
2. Replace Processor/Memory card.
3. Contact the response center.
Code Description Action
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