Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 53

Symptom-to-FRU Index The Symptom-to-FRU Index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with "General Checkout" on page 30. This index can also be used to help you decide which FRUs to have available when servicing a computer. If you are unable to correct the problem using this index, go to "Undetermined Problems" on page 49. Notes If you have both an error message and an incorrect audio response, diagnose the error message first. Check all power supply voltages before you replace the system board. (See "Power Systems Checkout" on page 35.) Beep Symptoms Beeps symptoms are short tones or a series of short tones separated by pauses (intervals without sound). See the following examples. Beep Symptom 1-1-3 CMOS write/read test in progress or failure. 1-1-4 ROM BIOS check error. 1-2-1 Programmable interval timer 0 test in progress or failure. 1-2-2 DMA channel 0 address and count register test in progress or failure. 1-2-3 DMA page register write/read in progress or failure. 1-3-1 RAM refresh verification test in progress or failure. 1-3-3 First 64K RAM chip or data line failure, multi-bit. 1-4-2 Parity failure first 64K RAM. 1-4-3 Fail-safe timer failure (only used by EISA BIOS). FRU/Action 1. Run Setup 2. System Board 1. System Board 1. System Board 1. System Board 1. System Board 1. System Board 1. RAM Memory Board 2. System Board 1. System Board 1. System Board ThinkPad 365 (2625) 41