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My presario us 700 screens comes on but the screen is dark ie will not brighten up what can i do

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Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Posted on Sep 08, 2010

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2 Answers

The screen's back light seems to be off but i can


Either the lcd inverter or the lcd itself is bad. If the machine is under warranty then call HP to get it serviced otherwise

254108-001 is the part number for the lcd

Couldn't find the part number for the inverter board but I found one on Ebay here:

http://cgi.ebay.com/compaq-presario-700-inverter-board_W0QQitemZ260535107682QQcmdZViewItemQQimsxZ20100109?IMSfp=TL100109224006r14935


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