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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 | FRU/Action |
|---|---|
| ° LCD backlight not working, or | 1. Reseat the LCD connectors. |
| LCD too dark, or | 2. Inverter Card |
| ° LCD brightness cannot be adjusted, | 3. LCD Assembly |
| or LCD contrast cannot be adjusted. | 4. Keyboard Card |
| 5. DC/DC Card | |
| ° LCD screen unreadable, or | 1. See the preceding important note. |
| Characters missing pels, or | 2. Reseat all LCD connectors. |
| ° Screen abnormal, or | 3. LCD Assembly |
| Wrong color displayed. | 4. System Board |
| 5. Keyboard Card | |
| LCD has extra horizontal | 1. LCD Assembly |
| or vertical lines displayed. | |
| No beep, power-on indicator on, | 1. System Board |
| and a blank LCD during POST. | 2. DC/DC Card |
| 3. Processor Card |
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.