Hp 8440p power on but no display Solved LA-4902P. 

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thanks for your comment.

thanks for your comment. yes you need to remove motherboard from your laptop.

@@Laptop_repair_zone So I had to look closer I have the Elite book 8540p but similar issue. So honestly with not knowing what to look for is it even that likely to be the same issue? I talked to someone here and he said he's going to assume its the graphics card.

Same here with 8460P

@@cieknie you got the solution

Thanks for your comment, sorry I don’t have.

Thanks for your comment. clean RAM or change it, if not solved then check all the required voltage and signal step by step.

Follow the schematic diagram,power on sequence.

How to find or get any schematic diagram...web site or ....

Search in google.

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