Laptop is turning off by itself.

Comment by ginko, posted on Nov 14, 2009

Hi.

If the laptop is turning off when idle, then check power saving settings, accessible from control panel.

If laptop turns off while you are using it, try first reinstalling the system to exclude system problems, or test the laptop starting OS from cd or staying in Bios settings mode, so to exclude installed system.
If laptop is still shutting down, then problem may be overheating.
Overheating usually happens when the fan is not coming , therefore when the computer overheats.Or the fan is not cooling enough and computer is overheating.

Monitor computer temperature using a software check if Fan is coming up when temperature gets critical.

If fan comes up but does not cool enough, then replace the fan, it is not efficient anymore because of a bad bearing or dust. ~Also ensure that fan is well mounted, if fan has poor contact with CPU surface , cooling will be poor.

If fan does not come up, and critical temp is not detected, then the sensor on the main board is bad, this is very uncommon. When this happens the problem is usually related to system or power settings , rather than overheating.

If fan does not come up and temp is critical, then fan is faulty, replace it.

There are also more than one fan on many laptops, check that one of the fans (CPU fan, video fan) is not completely ded, and therefore cause for the problem.

By using the software below you can also find out if the problem is really overheating. If temperature results within normal range, then usually it is not overheating.In that case test system and check power saving settings.

Here is the software to control your fan and temp. sensor state:

Download SpeedFan - Access temperature sensor in your computer

Download SpeedFan 4.38

SpeedFan - Free software download