Lenovo ThinkPad 370 Hardware Maintenance Manual - Page 341

Symptom-to-FRU Index The Symptom-to-FRU Index lists the symptoms and errors and the possible causes. The most likely cause is listed first. Perform the FRU replacement or actions in the sequence shown in the "FRU/Action" columns. If a FRU did not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU. This index can also be used to help you decide which FRUs to have available when servicing a computer. Numeric error codes show the errors detected in POST or system operation. In the following error codes, X can be any number. If no codes are available, use narrative symptoms. If the symptom is not listed, go to "Undetermined Problems" on page 343. Note: For IBM devices not supported by diagnostic codes of the ThinkPad computers, see the manual for that device. Numeric Error Codes Symptom/Error FRU/Action 10X 1. System Board 110 1. Go to "Memory Checkout" on page 317. 2. IC DRAM Card or DIMM Card 3. System Board 111 1. Go to "Memory Checkout" on page 317. 2. Expansion Unit/Port Replicator 3. System Board 158 (HDP was not set even though the supervisor password is set.) 1. Set a HDP. 159 (HDP is not set the same as the supervisor password.) 1. Set a correct HDP. 161 1. Go to "Checking the Backup Battery" on page 326. 2. Backup Battery 3. System Board ThinkPad 755CD, 755CDV (9545) 331