Which hardware is faulty? help me.

I'm doing my best to make this short:

Compaq Presario B3804, Centrino 1.6G, 512RAM, ATI9700

1 month ago, if game was running, fan boosted to max and won't slow down.
SYSTEM process's 100%CPU. windows can't cut off power automatically. without playing game, or standby computer and wake it, everything's good, normal shut off...

Then, Harddrive formatted, windows reinstalled, drivers updated, Ram upgraded, then Raw windows, Raw drivers from Compaq, ... problem remains.

harddisk replaced(from toshiba 40G to samsung 40G), this time it's getting worse, CPU's 100% all the time(SYSTEM, in task manager, sometimes SVHOST). process explorer shows DPC around 50% and hardware interrupt about 30%. Even nothing is installed (Raw windows).

No problem about network, harddisk and Ram. no problem about software, they worked very well 1 month ago. It seems only motherboard, graphic card or CPU could have problems. No www threads helped. Any master could help me identify the problem? Thankssssssssssssss.

Re: futher help

Sorry for a very late reply, cos it seems to be normal now.



I still want to find out the source of darkside, Thank you for your help.



Here's the additional information as you required:

Game: not necessarily games. Not solitaire level, very hard to define. any bigger ones could trigger the problem like whatever 3D games ,even disk defrag (CPU: SYSTEM(DPC) high), windows update - from website.(SVCHOST high). not auto update, auto update is fine.



HardDrive: old: Toshiba 40G probably 4200 or 5400 rmp. New: Samsung 40G 5400rmp. problem raised BEFORE I replace the harddrive and remains with the new one.



RAM: old: 256M DDR. New: just added a same one. total 512 now. (Problem occured BEFORE I upgrade the RAM)



STARTUP apps/service: Only Windows Raw process/service, no change made, not a single third party software. Problem remains.



ATI9700: I tired HP/Compaq ver, ATI ver, Third party ver like OMEGA, no difference at all.



Cut off: I manually shut off (Hold power button for seconds). Then I found I could stand by the computer, it works. everything's shut off because it's laptop. then wake up, everything's fine now, shut off then normally.



Get out of Game: everything's normal. normal closing game.



Circumstances: I could hardly remember any obvious symptons. One thing is I poured some soup like stuff on keyboard 3 months ago. could anything of mother board damaged? but it's quite long time before problem raised.
Another thing is I always keep my computer running with downloading something sometimes for a week long.



Now the situation is I shut off the computer and cooled down it totally. Surprisingly after that it's running perfectly now. I didn't try any game now. I just dare not.

Thank you qhn.

Until now nothing has gone wrong again and I'm quite sure no problem of software/drivers/harddrive space.

Your advice of ventilated environment and vacuum would be very helpful, coz my laptop's really in a dirty circumstance. also guys on my another thread http://www.notebookforums.com/thread174592.html helps a lot on this thing. I'm on my way deep cleaning her.

Thank you for all of you. This forum's really good one.