Laptop screen goes completely black but shows that it's still on

Question

Hello everyone, i'm in need of serious help!
I bought this laptop over 2 years ago (October of 2008 to be somewhat exact). It's a Windows Vista Home Premium, with service pack 2.
its an HP pavilion dv7 notebook pc
processor: AMD Turion (tm) X2 Dual-Core Mobile RM-70  2.00 GHz
Ram: 4GB
system type: 64-bit operating system
im assuming the video card information are as follow:
name: ATI Radeon HD 3200 Graphics
chip type: ATI Radeon HD 3200 Graphics (0x9612)
DAC type: Internal DAC (400MHz)
total memory: 1914MB
memory: 3836MB RAM
page file: 2163MB used, 5732MB available
current display is 1440 x 900 (32 bit)(60Hz)
directx version: directx 11
with that being said... here's my dilemma...
Each time i play the video game, "World of warcraft", my laptop's screen goes completely black but it shows as if though it is still on. I can't see the screen but it shows that it is still on by the little lights on the bottom of the screen.
I took my laptop to a family friend who knows a lot about computers to see if they can fix it for me. They told me that everything was running fine, everything is okay, the ram, memory, graphic card, everything passed the test, and it was not over heating... there was nothing wrong with my laptop. They THOUGHT it could be the motherboard, so they tried it, but in the end, it wasn't. Unfortunately the problem was not solved.
I played World of warcraft on this laptop before. When i first bought it. It ran smoothly and gave me no problem whatsoever. I'm clueless is to though why it's giving me problems NOW.
Could anyone please please pleaseeeee help me? i have given up already. I have done everything i could. Please help me! i believe i have done a total one 1 or 2 system restore to factory settings, the 2nd one was recently (probably a month ago) and i'm not sure if maybe perhaps i needed to DL something else? i have DL all the updates that microsoft offered to me when needed and when it was necessary, but this particularly problem was never fixed.
someone please help me! Thank you so much!

Answer 1

erichon99,
I think i may have found MY solution but i have yet to test it out... No one helped me. No one at all. I took my PC to a family friend company and they did everything for me: ran tests to see if my laptop is up to date with everything, removed graphic card and put a better one and nothing still. They thought it was my mother board but they ran tests again and everything on my laptop past the test. My graphic card was fine, ram was perfect, memory was perfect, everything everything on my laptop was perfect. They couldn't find out what was the problem. I took it to best buy and not even them could help me. When i was about to give up, my fiance, he did some research and found this guy on youtube who does LIVE recordings and answers people's questions. My fiance asked the question and he got serveral responses. Out of 10, i would say about 2 or 3 of them mentioned, "it's the power cord" the rest said it might be virus, or a card is not working properly, etc. You can give it a shot (buying a new power cord) those who told my fiance that it could be my power cord, said to get those power cord that has a fan in them.
I think this makes sense because my screen goes black only when i'm playing a game. even when i play cityville on facebook it goes that black screen, but it doesn't go black, it does that pixelated, rainbow, warning bar, thingy (i hope you know what i mean lol) and when i touch my power cord to my laptop it is BURNING hot. What i do is, when my battery is fully charge, i disconnect and play my game, and to not lose any docs i left open, i close my games, and plug back in. I've been lazy to find another power cord lol i guess i should start now, huh? lol
i hope this help. I would say (if you've done everything like how i did) buy a power cord that matches your laptop, but with a FAN in it (i was told it's the best and you'll never have that problem of freezing or whatever)