HP Pavilion DV9500

I purchased an HP Pavilion dv9500. In April 2008 the Nvidia 8600M inside it failed and HP replaced it under warranty.Now,my 2nd Nvidia 8600M GS has failed. Symptoms include artifacts, texture corruption in 3D apps, and a complete and total system lock up which can only be fixed via a hard reboot. Artifacts persist unless I leave the laptop off for an around 20 minutes, at which point I can boot it into safe mode without fear of locking up. I have already reinstalled hp pavilion dv9500 battery and installed the latest drivers for the video card. I spoke with (edit: woops, HP, not Nvidia) and they want me to pay $400 for a new motherboard and 8600M GS. I've seen on multiple sites* that there is a major problem with the 8600M GS failure rate.

This is the second time I have seen a hp pavillion dv9500 laptop with something screwed up. First one was a case where all of a sudden the screen would just not show up anything. nothing. not even if you hooked itup to a second monitor. but it powered on, and you could hear it. ended up getting it diagnosed and got told that the motherboard needed to be replaced, it cost about $500. Now i have one, that when you boot hp pavillion dv9500 series battery up to start windows normally, after about 3 minutes, all of a sudden the screen goes bad, it turns into a bunch of repeating squares ind just stays stuck like that until you power it off. I do not really know what to make of it. I dont know if i want to just go ahead and try to reformat it, or if there is some other hardware component that is likely causing this, or what it is that i should do. Any advice on what to check, what to look for? It seems to boot into safe mode fine... the screen looks completely fine, everything looks totall normal, and then all of the sudden it goes to scribbled lines of squares.

 

 

Key Features of HP Pavilion dv9500:

• AMD Turion 64 X2 Dual-Core Mobile 1.80 GHz
• Windows Vista Home Premium
• 17" widescreen high definition display,
• 1GB Dual-channel 667MHz DDR2 SDRAM
• 160GB 5400RPM SATA Hard Drive
• Optional HP Integrated Fingerprint reader

Is there any word of dell 310-9080 battery doing something similar? I attempted to bring the issue up with the technician I spoke with but she ignored it. I spoke with her for around an hour and got nowhere. Any advice any of you can offer would be greatly appreciated.

PROBLEM SOLVED
Got same problem all of a sudden.
After searching some forums i came across a solution that really worked.
There's some sort of a problem with this chip(dont ask me how and why)

 

So the solution:
1.Remove Heatsink(cpu-vga)
2.Remove nearby pcie wifi or/and bluetooth.
3.Get a hair drier(YES A HAIR DRIER)
4.aim the heat stream direct on the vga chip(aprox. 3cm away) for 5 mins
5.WORKING VGA CHIP AGAIN

Mine works now im actually posting this from my laptop
I'll get the link with from the original poster.
Although he hasnt given specific details on why this fixes the problem but as far as i get it, through time and heat levels some of the chip's pins when hot must not have contact(along with shocks)