Lenovo ThinkCentre A52 User Manual - Page 86

Beep symptoms Beep symptoms are short tones or a series of short tones separated by pauses (intervals without sound). See the following examples. Beeps 1-2-X 4 Description v One beep v A pause (or break) v Two beeps v A pause (or break) v Any number of breaks Four continuous beeps Use the following table to diagnose beep symptoms. Beep Symptom 1-1-3 CMOS read-write error 1-2-2-3 ROM BIOS check error 1-2-1 Programmable Interval Timer failed 1-2-2 DMA Initialization failed 1-2-3 DMA page register write/read failed 1-2-4 RAM refresh verification failed 1-3-3-1 1st 64K RAM test failed 1-3-2 1st 64K RAM parity test failed 2-2-3-1 Interrupt vector loading test failed 2-1-1 Secondary DMA register failed 2-1-2 Primary DMA register failed 2-1-3 Primary interrupt mask register failed 2-1-4 Secondary interrupt mask register failed 2-2-1 Interrupt vector loading failed 1-3-1-3 Keyboard controller failed 2-2-3 CMOS power failure and checksum checks failed FRU/Action 1. Run Setup 2. System Board System board System board System board System board 1. Memory module 2. System Board 1. Memory module 2. System Board 1. Memory module 2. Processor 3. System Board System board System board System board System board System board System board 1. System Board 2. Keyboard 1. Battery 2. System Board 80 Hardware Maintenance Manual