Note: Try reseating a suspected component or reconnecting a cable beforereplacing the component.The POST BIOS code displays POST error codes and messages on the screen.Beep symptomsBeep symptoms are short tones or a series of short tones separated by pauses(intervals without sound). See the examples in the following table.Beeps Description1-2-3 v One beepv A pause (or break)v Two beepsv A pause (or break)v Three beeps4 Four continuous beepsOne beep after successfully completing POST indicates the system is functioningproperly.Note: See “System” on page 108 to determine which components a field service technician should replace.Beep/symptom FRU/action1-1-2(Microprocessor register test failed) 1. Optional microprocessor (if installed)2. Microprocessor3. System board1-1-3(CMOS write/read test failed) 1. Battery2. Clear CMOS (see “Recovering the BIOS code” on page 68).3. System board1-1-4(BIOS EEPROM checksum failed) 1. Recover BIOS2. System board1-2-1(Programmable Interval Timer failed)System board1-2-2(DMA initialization failed)System board1-2-3(DMA page register write/read failed)System board1-2-4(RAM refresh verification failed) 1. DIMM2. System board1-3-1(first 64K RAM test failed) 1. Reseat the DIMMs2. Replace the lowest-numbered pair of DIMMs with an identical known goodpair of DIMMs; then, restart the server.Return one DIMM at a time from thefailed pair to its connector, restarting the server after each DIMM, toidentify the failed DIMM.2-1-1(Secondary DMA register failed)System board2-1-2(Primary DMA register failed)System board74 xSeries 346 Types 8840 and 1880: Hardware Maintenance Manual and Troubleshooting Guide
