Compaq presario blank screen. still works on external monitor. Have checked screen resolution and installed new driver but still no success any advice would be welcome
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connect it to external monitor - if blank to then problem in video card if works fine then check LCD cable - test it with any multimeter with sound mode, iuf OK then carefully connect it back, if broken then replace it, so, last one is LCD, if video card OK , LCD cable ok - then replace LCD
1plug in monitor 2.right click desktop go to properties (on XP) or screen resolution (on 7 or vista) you should see two boxes labeled one and 2 double click 2 that's you monitor...on xp in the properties window go to settings tab to find that option, if it does not show up reset your computer with external monitor plugged in and repeat process if necessary if that doesn't work you need to update driver for your graphics card/chip
Seems it is the Video card which has gone bad, If in case your system shows Compaq on your screen, os in that case need to install windows in the system again.But if it does not , Please get your system's Video card again.
I think your LCD is stuffed is it under warranty do you know BUT if the screen is cracked they wont replace it typical HP. To get your external monitor running hold down the function key and the blue monitor looking key similtaneously normally on compaq its the F4 key but look around your keyboard (looks like a monitor) and is blue letters.
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