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Toshiba P35-S605 shuts down

The Toshiba Desktop Replacment 17" model P35-S606 mentioned turns off with no warning. The computer will stay running longer if not connected to the AC outlet. Often will shut down as soon as a minute or as long as 1/2 hour when connected to an AC outlet. It Typically runs longer up toward the 30 minute when good ventillation is provided. Were sure the battery is not just dying because it is plugged into the wall. Often when we do charge up the battery completely the laptop will break its 30 minute record attained when plugged in. When the button is pushed after it fails it will turn right back on again. The Operating system is Xp, it has a pentium four mobile processor running at over 3 Ghz. Our question is what trouble shooting steps would you recommend to discover why this laptop is failing.
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TomStarich
Asked:
TomStarich
1 Solution
 
MarkCommented:
This sounds like overheating of the CPU. When only on battery the processor would use Intels speedstep technology to slow the processor speed and produce less heat, and running for a longer period before shutting down.
Check that the fans are running and producing air movement.
You may have to open the laptop up to inspect the heatsink for dust clogging, and clean , reapply thermal paste to the CPU.
Here is a dissassembly guide for the P35
http://www.irisvista.com/tech/laptops/ToshibaP35/SatelliteP35_fix_overheating_1.htm
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nobusCommented:
>>  Were sure the battery is not just dying because it is plugged into the wall.   <<   this does not mean anything; you have to test from battery alone, or from AC alone.
Try a full discharge / charge cyclus. Or try a new battery
BTW - did you let the battery run a full cyclus regularly ? if not your battery may be worth only 10-20% of its capacity
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Computer101Commented:
Forced accept.

Computer101
EE Admin
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