Lenovo ThinkPad 365E-ED ThinkPad 365, SelectaDock I - Hardware Maintenance Man - Page 58

Error Message/Symptom Unresolved memory parity error Type (S)hut off NMI, (R)eboot, other keys to continue. Parity error occurred. Cause undetermined. xxxxxh Option ROM checksum failure where xxxxxh is the starting address of the option ROM FRU/Action 1. System Board 2. SO-DIMM 3. Optional Memory (8MB or 16MB Board) 1. Power-off, Power-on, Retry 2. Peripheral Card LCD Related Symptoms Important The TFT LCD of the notebook computers contain over 921 000 thin film transistors (TFTs). A small number of missing, discolored or lighted dots (on all the time) is characteristic of TFT LCD technology. Excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing or discolored, or lighted dots in any colored background is 21 or more. Symptom/Error LCD backlight not working, or LCD too dark, or LCD brightness cannot be adjusted, or LCD contrast cannot be adjusted. LCD screen unreadable, or Characters missing pels, or Screen abnormal, or Wrong color displayed. LCD has extra horizontal or vertical lines displayed. No beep, power-on indicator on, and a blank LCD during POST. FRU/Action 1. Reseat the LCD connectors. 2. Inverter Card 3. LCD Assembly 4. Keyboard Card 5. DC/DC Card 1. See the preceding important note. 2. Reseat all LCD connectors. 3. LCD Assembly 4. System Board 5. Keyboard Card 1. LCD Assembly 1. System Board 2. DC/DC Card 3. Processor Card 46 IBM Mobile Systems - ThinkPad HMM Volume 3