This page shows about the model that I think you listed and how to take it apart.
The main thing to do first is identify the source of heat.
Once you identify the source, try taking it out and reinstalling it.
If that doesn't work, the only other thing you can do is replace the part.
Remember that some toshiba laptops tend to run hot anyway. I have hade two of them. The less powerful ran fairly cool but the more powerful is pretty warm. There is only so much that you can do besides cooling pads and using it in a cool environment. Make sure not to obstruct any vents as much as possible. If the processor is hot and you tried reinstalling it with no success, you can do some research and find another processor that is compatible with your computer that naturally runs cooler. This is all I can tell you. If none of this helps, there isn't anything you can do. Hope this helps.
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You laptop likely is not overheating per se, but it appears that the cable located between the video card part of the motherboard and the monitor may not be secured as it should. Vibration, and perhaps temperature, can cause this cable to shift ever so slightly causing symptoms that you describe.
If taken to a repair shop, the charge should be nominal for them to disassemble the laptop to the point where they can access and secure the cable. At worst, the cable may need to be replaced due to wear.
The easiest way to confirm that it is a cable or not is to try and plug in a monitor to the back of your laptop. If the problem appears on the panel, and not the external monitor, then you are almost certainly looking at a cable issue. If the problem appears on both monitors, then it is a different issue, perhaps overheating like you suggested.
The initial message you see may be an indication that the CPU fan is not working. I suggest you remove the bottom cover of your notebook and use a compressed air can to clean it up throughly. It'll help with the overheating problem.
Most notebooks have an electronic fan control, but the fan should be ON all the time (it may slow down or speed up). I suggest you downlaod CPUID's Hardware Manager from here (it's free):
This problem is likely caused by overheating. The CPU reaches a temp to high and shuts the system down. When you try to turn it on the system is still to hot and it will not let the computer power on. You can try blowing out the fans and heat sink with an air compressor or can of compressed air. If this does not help the problem you may need to have thermal compound reapplied. If that does not fix it it will need a new heatsink/fan/
Try to vacum the dust way from the fan, and try to blow the dust u cant vacum whit compressed air.
If that dosent help you need to buy a new fan. Be carefull so your laptop dosent overheated, the heat cam make big damages inside your laptop.
yes. normaly fan switched on automaticaly when the microprocessor warm up. inyour case some time the sensing of microprocessor and fen contorler had the problem .however you open your laptop and trying blow up with the vacum cleaner to do clean dust deposited inside your laptop mostly it will help to slove your problem.
trying up to your satisfaction.
It is quite possible that you need to replace the cooling fan. You can get used parts for this machine on Ebay pretty cheap now. I have seen the fan assy go for about $8-20.00. They are a bit of a job to replace. Just take your time.
I had this problem for a LOONNGG time. I couldnt figure out what the heck was going on or why it was overheating. I almost resorted to buying a new computer, but thankfully I didnt. About 1am this morning it did it to me again. So i decided to clean the bottom and make sure it was clean. I cleaned it, and just out of curiousity, took apart the exhaust fan housing, and O. M. G. was there a TON of dust and junk in there. It took me about 45 minutes to clean it out thuroughly because I am not very computer savy when it comes to taking them apart and putting them back together correctly. But I would be my paycheck that if you took of your exaust fan housing, and then the individual covers for the fan and inspected the fans, and the exhaust ports themselves, you will find your problem. Since i cleaned it, it hasnt turned off once and the fans hardly run at all! I hope this helps guys!