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Laptop freezes with AC power, and freezes if plugged in then unplugged

Posted on 2011-03-23
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Last Modified: 2012-05-11
I have a Toshiba Satellite A205 running Windows Vista Home Premium.  If I try to turn the computer on with the AC adapter plugged in, it starts to boot and gets to the Windows loading screen and then it freezes.  If I boot without the charger, the computer runs fine.  If I plug the charger in, sometimes it freezes.  If it doesn't freeze when I plug it in, it will freeze after I unplug it.

I have tried 3 different chargers, and tried booting without the battery installed.  I changed the power settings so plugged in and battery power had the same settings.  I have ran Malwarebytes, Rkill, and SuperAntiSpyware.  I am out of ideas, so any help would be greatly appreciated.  
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Question by:JTechComputer
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Accepted Solution

by:
coredatarecovery earned 2000 total points
ID: 35200847
Most likely, you are having either a problem with the power connector, or the charging circuit on this unit.

You could also be having an issue with the hard disk as the model handles performance modes differently with power or on battery.

I'd run hdsentinel and check the smart status of your hard disk to see what the disk health is first, because if the drive is having issues, due to power surges you can see this in the hdsentinel window.

download it from www.hdsentinel.com and run a trial of pro.

If power surges are detected on the hard disk, you have a broken power connector causing this.

If the smart status shows bad sectors, try replacing the hard disk.

If nothing is detected, It may be the charging circuit and I don't have a procedure for that on this model, anyone out there familiar with the details on the A205 motherboard?

Try the above and let me know the results.
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LVL 12

Expert Comment

by:Grant1842
ID: 35203842
First I would check the laptop AC adapters here.
http://www.experts-exchange.com/Hardware/Laptops_Notebooks/A_3413-Check-Laptop-Power-Adapter-Voltage.html

Next I would check the DC power jack here.

http://www.experts-exchange.com/Hardware/Laptops_Notebooks/A_4102-Diagnose-And-Repair-Your-DC-Power-Jack-On-Your-Laptop-Mother-Board.html

All so when I see locking up and freezing I suspect that the processor and video are getting to hot. It could be some dirt and lent blocking the heat sink and overheating.
May need some new thermal past on processor and video chip as well.
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Author Comment

by:JTechComputer
ID: 35208084
Thanks for the suggestions.  

The result of the hdsentinel is attached.  

The AC adapters are putting out 19.37 volts, 19.71 volts, and 19.35 volts.
The DC jack has continuity and is working fine.

The computer isn't on long enough to be overheating, and speedfan shows 48C at the highest core temp
Disk-report.txt
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Author Closing Comment

by:JTechComputer
ID: 35244657
It turned out to be a problem with the motherboard, and the customer didn't want to replace it.  Thanks for the help tho!
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