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My friend has a Sony Vaio he bought in 2012

  • Model: VPCEH27FD
  • CPU: i5-24XXM (Will get the specifics later)
  • RAM: 4GB DDR3
  • Graphics: Nvidia GT410M
  • HDD: 750GB SATA3
  • OS: Windows 7 64 bit Home Premium

This only started happening very recently:

He'd be using the laptop, and it would suddenly shut down, or restart. As in screen goes black along with all the lights, or go back to the start up screen with the VAIO logo, and then the Welcome screen etc.

I don't think this is due to overheating because the laptop never felt hot at all when it happens, and it doesn't always happen when he's gaming.

And sometimes, the laptop just wouldn't boot. The lights on the laptop fades on and off as you hold down the power button and release it (Apparently this happened again today, but without the lights). It does the same if you plug it into an AC socket, or if you remove the battery with it plugged in. It will only boot normally after you remove the battery and unplug it from the wall, and hold down the power button for a few seconds.

I have no idea why this happens. There are no scratches, or broken bits on the case. I don't think he ever dropped it.

I also checked the event logs in Windows. All I could find were logs of how the system was improperly shut down, and the exit code was always 0 apparently...

Update 1: I blew dust out of the vents 2 months ago. Lots of particles came out.

Update 2: The laptop was low on battery this morning, and went into hibernation. But it wouldn't start again until he removed all power sources and held down the power button. He's also said that it doesn't abnormally shut down now, but the laptop not being able to start is becoming exponentially frequent.

What's going on with this laptop?

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Just because it doesn't feel hot doesn't mean internally it's not overheating. Clean the vents and cooling apparatus (fan, radiators, etc,). –  techie007 Nov 23 '13 at 20:50
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