Having problems with your Compaq Evo N620c Notebook ?

My Compaq N620c powers up but only shows only a black screen

\015 Screen is black when power is on and does not responed to windows commands, I even hooked it up to docking station but still get the black screen on an external monitar it won't even power down unless I hold the standbye swicth for a few seconds, I can't even make it into the BIOS menue!!\015

Answers :

It could also be a faulty video chip on the motherboard especially if you do not get video output on an external monitor. There should be beep codes when faulty memory is present or a faulty processor or processor fan. Laptops do not use power supplies rather mosfets soldered on the motherboard and an external power transformer. If the transformer is bad then the little green light on the "power brick" will not light up and you would get no response at all from the computer. Faulty video will cause the system not to boot to bios or post.
Remove and refit clock battery, it's next to the modem card.
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