Posted 22 March 2012 - 01:15 PM
Sometimes the event log will say only that "the previous system shutdown was unexpected." Not much help, right? But if you check around the sides and back of your laptop, you should see where there are some vents for cooling. If it's overheating, it should feel pretty hot around that area. Blow out the vents with some canned air (you can get it at Wal-Mart, or someplace like that for less than 10 bucks). Turn it on and listen to see if you can hear the fan kick on. Also, when you turn it on, some systems will actually give you a message after the POST like "the cpu was shut down due to a thermal event." Keep in mind, however, that overheating is just one of the things I mentioned. Did you check the battery to see if it is holding a charge? Did you check to see if the connection between the power adapter and the laptop is solid? You said it tends to happen when you are connected to the internet. Try leaving it running for a few hours while NOT connected. Sometimes a bad network card will cause these shutdowns. Also, try getting into the BIOS (usually F2 when you first power it on) and leave it running to see if it happens. I hope these suggestions help.
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