Lenovo ThinkCentre M82 Hardware Maintenance Manual (HMM) (May 2012) - ThinkCen - Page 74

Miscellaneous error messages Message/Symptom FRU/Action Changing display colors Display/Monitor Computer will not power-off. See "Hard disk drive boot error" on page 65. 1. Power Switch 2. System Board 3. Riser card, if installed Computer will not RPL from server 1. Ensure that network is in startup sequence as first device or first device after diskette 2. Ensure that network adapter is enabled for RPL 3. Network adapter (Advise network administrator of new MAC address) Computer will not perform a Wake on LAN (if applicable) 1. Check power supply and signal cable connections to network adapter 2. Ensure that the operating system settings are set to enable Wake on LAN 3. Ensure Wake on LAN feature is enabled in Setup/Configuration (see "Starting the Setup Utility program" on page 59) 4. Ensure network administrator is using correct MAC address 5. Ensure no interrupt or I/O address conflicts 6. Network adapter (advise network administrator of new MAC address) Dead computer. See "Hard disk drive boot error" on page 65. 1. Power Supply 2. System Board Diskette drive in-use light remains on or does not light when drive is active. 1. Diskette Drive 2. System Board 3. Diskette Drive Cable Flashing cursor with an otherwise blank display. 1. System Board 2. Primary Hard Disk Drive 3. Hard Disk Drive Cable Incorrect memory size during POST 1. Run the Memory tests 2. Memory Module 3. System Board "Insert a Diskette" icon appears with a known-good diagnostics diskette in the first 3.5-inch diskette drive. 1. System Board 2. Diskette Drive Cable 3. Network Adapter Intensity or color varies from left to right of characters and color bars 1. Display 2. Video adapter (if present) 3. System Board No power or fan not running 1. See "Hard disk drive boot error" on page 65. 68 ThinkCentre Hardware Maintenance Manual