Lenovo ThinkPad 360 Hardware Maintenance Manual - Page 53

2. Check the cables, wires, and connectors for short circuits and open circuits. Visually check them for damage. If any problems are found, replace the FRU. 3. Remove or disconnect all of the following devices. a. Non-IBM devices b. Devices attached to the expansion bus connector c. Printer, mouse, and other external devices d. Battery pack e. IC DRAM card f. PC cards Note: Remember that removing the hard disk drive, an IC DRAM card, or any adapter or device, might cause configuration errors. Ignore error code 174. 4. Power-on the computer. 5. Determine if the problem has changed. 6. If the problem does not occur again, reconnect the removed devices one at a time until you find the failing FRU. 7. If the problem remains, replace the following FRUs one at a time. Do not replace a non-defective FRU. Modem card (if installed) LCD assembly System board Related Service Procedures This section provides information about the following: "Status Indicators" on page 44 "How to Run the Diagnostics" on page 45 "Error Log" on page 45 "Reset Pushbutton" on page 46 "Checking the Installed Devices List" on page 46 "How to Run the Low Level Format" on page 46 "PC Test Card LED" on page 46 "Fn Key Combinations" on page 47 "How To Run the Keyboard Diagnostics" on page 47 ThinkPad 340x (IBM 2610) 43