[Slapdagger]

Dell Precision M6500
Windows 7 / 64bit.
Processor Intel(R) Core (TM) i7
CPU Q720@1.6 ghz 1.60.ghz
Installed Memory (RAM) 8Gb.

Graphics Card: NVidia Quadro FX 2800M

Hello, I've owned this laptop for just over a year and for the first few months it functioned perfectly fine with no issues. I encountered some problems with over-heating but I managed to fix it with some compressed air and cooling pads.

Around 8 months ago it suddenly just stopped working whilst it was plugged into the AC adapter, and when the laptop would crash the screen would turn black and any sound playing at the time would be looped (Proving it's not a monitor issue).

I tried to hook it up to an external monitor anyway, which yielded the same results.

I contacted Dell and they came in 4 visits replacing both the motherboard, graphics card (three times) the heat-sync the keyboard, changed the hard-drives, it has been reformatted around 5 times and still the issue continues.

The issue itself being at any random time the laptop will crash and the screen will turn black, it only happens when the laptop is plugged into the mains. I've tried replacing the AC adapter through dell and still the same issue occurred.

I've kept drivers up to date, I've tried literally everything I've read and I'm stumped.

The only way to get out of the crash is to hold down the power button for 10-30 seconds to manually shut down the laptop.

Dell in the end decided to replace the laptop but left us with this one, but unfortunately my brother has been left in charge of the new one and I've been left with this one. Any help would be greatly appreciated; If you need anymore information I will be happy to provide it.

Thanks in advance.

[TerryNet]

it only happens when the laptop is plugged into the mains.

After all that Dell has done and even providing another laptop it will be fantastic if anybody can come up with another idea.

I suggest a change of habit if the battery still has decent life. Try to use the PC just on battery, and then charge it when the laptop is shut down or hibernating. I realize that is not always convenient or possible.