Lenovo ThinkPad 370 Hardware Maintenance Manual - Page 92

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 68. This index also can be used to help you decide which FRUs to have available when servicing a computer. If you cannot correct the problem using this index, go to "Undetermined Problem" on page 93. IMPORTANT: 1. If you have both an error message and an incorrect audio response, diagnose the error message first. 2. If you cannot run the advanced diagnostic tests, but did receive a POST error message, diagnose the POST error message. 3. If you did not receive an error message, look for a description of your error symptoms in this index. 4. Check all power supply voltages before you replace the system board. See "Power Systems Checkout" on page 71. 5. If an error message is not listed, there is a device installed that requires an additional diskette or service manual. Refer to the diskette or service manual for that device. How to Read POST Error Messages POST error messages are displayed on the screen as 3, 4, 5, or 8 digits. The error messages that can be displayed as shorter POST messages are highlighted in this Symptom-to-FRU Index. Note: Adjust the speaker volume before you power-on the computer. In the following error codes, an X can be any number. Numeric Error Codes Symptom/Error FRU/Action 00010200, 00010300, 00010400, 00010700 1. System Board 00010800 1. System Board 2. Processor card 00011000 1. Go to "Memory Checkout" on page 70 before replacing any FRUs. 2. Base Memory Card 3. IC DRAM Card 4. System Board 000113XX 1. System Board 2. Processor Card 82 IBM Mobile Systems HMM