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NOTE: To diagnose a problem, first find the BIOS error beeps in left column. If directed
to a check procedure, replace the FRU indicated in the check procedure.
If no check procedure is indicated, the first Action/FRU listed in right column is the most likely cause.
| BIOS Error Beeps | Action/FRU |
|---|---|
| (L: long beep, S: short beep) | |
| L-S-L-L | System board |
| DMA internal register test fail | |
| L-S-S-S | |
| KBC (keyboard controller) self | |
| test is failed or not installed | |
| L-S-S-L | |
| Shutdown byte in RTC/CMOS | |
| read/write test failed | |
| L-S-L-S | Insert the memory modules in the DIMM sockets |
| System DRAM refresh cycle is | properly, then reboot the system. |
| out of specification | Memory module. See the 'Step 005' of 'Memory' |
| L-S-S-L | Shutdown byte in RTC/CMOS r/w test failure |
| L-L-L-S | to replace memory module. |
| The first 128KB of base memory | System board |
| r/w test failed | |
| L-L-S-L | See 'Flash (BIOS) Update Procedure' |
| The BIOS code in flash ROM is | System board |
| corrupted | |
| L-S-S | Video adapter card |
| Video buffer has error | System board |
| S-S | Reconnect monitor. |
| Console does not exist and | Monitor. |
| message displayed to terminal | |
| L-L-S-S-S | Ensure the system board has memory installed. |
| No DIMM installed | Insert the memory modules in the DIMM sockets |
| properly, then reboot the system. | |
| Memory module. See the 'Step 005' of 'Memory' | |
| to replace memory module. | |
| For 2139, 2153/K6 and 2163 only | |
| L-L-S-S | No SPD or revision is not correct |
| (Rev must be 1.2 or later) | |
| L-L-L-S | System board |
| Registered & Unregistered | |
| DIMMs are mixed | |
| L-L-L-S-S | Ensure the system board has no EDO type DIMM installed. |
| EDO DIMM & SDRAM DIMM are mixed | |
| L-L-L-S-S-S | Ensure the DIMM type is PC-100. |
| 66MHz DIMM running on 100MHz |
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.