LCD Related Symptoms
The TFT LCD of the notebook computers contain over 921000 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 | FRU/Action |
|---|---|
| No beep, power-on indicator on, | 1. System Board |
| and a blank LCD during POST. | 2. DC/DC Card |
| 3. Processor Card | |
| (370C, 750Ce, 755C, and 755Cs) | |
| ° LCD backlight not working, or | 1. Reseat the LCD connectors. |
| ° LCD too dark, or | 2. LCD Assembly |
| ° LCD brightness cannot be adjusted, or | 3. Interposer Card |
| ° LCD contrast cannot be adjusted. | 4. DC/DC Card |
| ° LCD screen unreadable, or | 1. See the preceding important note. |
| ° Characters missing pels, or | 2. Reseat the all LCD connectors |
| ° Screen abnormal, or | 3. LCD Assembly |
| ° Wrong color displayed. | 4. System Board |
| 5. Interposer Card | |
| LCD has extra horizontal or | 1. LCD Assembly |
| vertical lines displayed. |
Please see the LEGAL - Trademark notice.
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for any BUG on this page found - Thank you.