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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Laptop LCD problem inverter or backlight or video board ?
I have a Compaq Presario 1700t laptop, the 13.3" LCD is not functioning
correctly. When I turn on the laptop, the LCD is very dark but still can see the dim image of the Windows is booting up. Then I research on the problem and opened the case and find the inverter is ALPS KUBNKM011A. I ordered the inverter from ebay and replaced the old inverter. However the problem still exist. I found there is no difference on the dim image whether plug in the inverter or unplug it from the montherboard. I tested there is 12v dc output from the red wire but nothing from white and green in the middle. Also, no voltage (no dc nor ac)from the socket where the pink wire supposed to plug in. Could anybody help me how to test whether the inverter or backlight or video board having problem? Thank you!! The inverter looks like this http://www.impactcomputers.com/198700-001-ib.html# |
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