HP LAPTOPS NOT TURNING ON OR BLACK SCREEN. FIX ENCLOSED

Question

I placed this post in another thread, but it sounds like you have a damaged GPU.
I had this problem, but I have fixed it now. Fix below.
I have FIXED my misbehaving PC, and it is running better than ever!
I had the common problem that the GPU had overheated and had become unsoldered from the motherboard.
Here is how to fix it without spending hundreds of pounds/dollars!
Equipment/skills required...
*Small flat head electrical screwdriver
*Small Heat gun or jet lighter
*basic assembly knowledge of your laptop.
*know what a GPU is.
Firstly, strip the pc down to it's basic components, IE. screen, keyboard...
remove the motherboard and unscrew the heatsink from the board, leavint the CPU and GPU
exposed.
Remove the CPU from it's mount to prevent damage to it in the next step.
Surround  the GPU with kitchen foil, making sure not to cover it. (the foil dissipates heat and protects
the surrounding components)
now use a chef's style heat gun or jet lighter to heat up the GPU evenly, moving the flame in small circles, heating it up evenly. Spend about five minutes on this. (there is a covering of wax on the processor, don't worry about that...)
Remove the foil, but DO NOT throw it away! Fold a part of it up so it is approximately the same length and width as the chip on the GPU, but a little thicker. Put this folded foil onto the GPU to hold it there firmly when you put the heatsink back on. Place the heat sink and fan assembly back on the motherboard. If you cannot feel or see a pressure over the graphics processor unit, make the foil block a little thicker. make sure the foil is not touching any of the little capacitors or solder balls on the GPU. (you want to get lots of pressure with the foil. This will stop the graphics processor from coming loose again.
Put the entire pc back together and try it.
It worked well for me! 
Here's a link to the entire thread. 
http://h30434.www3.hp.com/t5/Hardware/Hp-G6000-Sta rtup-Problems/td-p/91754/page/3
Hope this works for you!
Smileygeckos

Answer 1

Have you tested your hard drive? Enter BIOS setup by tapping/holding the F10 key immediately after powering on the laptop.Use Diagnostics to test your hdd.
If you don't have Diagnostics in BIOS-try tapping Esc key immediately after powering on. From the menu that appears (hopefully) tap  F2 System Diagnostics.
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