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Try to fix the problem without taking the laptop apart first but I would recommend using a powerful air compressor instead of a vacuum cleaner.
Welcome to FixYa! Based on the error you have received, this means that the cooling fan of your laptop needs to be cleaned and checked at. This is a common problem with any toshiba laptop. I suggest checking the heatsink of your laptop. If the CPU heatsink is not clogged with dust and lint completely, you can use canned air and just blow it inside the laptop through the openings on the bottom and on the sides. It's nice as a precaution measure, but it might not work if your laptop already has a problem and the heatsink is completely clogged.
Open the laptop case, so you can access the CPU fan and the heatsink. In some cases you can access the heatsink through the latch on the bottom of the laptop. Sometimes (for example Toshiba Satellite A70/A75) you have to open the laptop case all the way down.
Carefully disconnect the fan cables on the system board and remove the fan. If the fan makes unusual sound when it spins (grinding sound), I would recommend to replace the fan.
Clean the fan and the heatsink with compressed air.
YOu didn't post the model number but you can order a new fan from the Toshiba website or possibly find one on Ebay and open the computer up and replace the non working fan. If you try running the laptop with out that fan it will over heat and you will burn your CPU out.
if the cooling fan is not working then the laptop will shut off due to heat issues. Than could just be clogged stopping it from spinning. I have seen the cooling fans go bad. The fan will def need to be repaired or replaced if not working. You can probably find one for it and replace it yourself if you have any technical experience
you probably need to clean the cooling fan...it collects dust over time, and doesn't move the warm air out as it should...its fairly accessible by removing the bottom case cover...please rate my response.....
first.you can find the processor fan in some computer shop,but i dont know if they will give you.second,check the model # of the fan and check in the internet for delivery or else,you can repair the fan by replacing the dynamo of the fan with another model of fan,just anly remove the screw of the fan and try to find another model fan and replace the dynamo fan.
This kind of issue is i try with some of my customer because they cant find the same model of fan.
If you DO NOT hear the fan running, have it looked at by a professional. Your fan may have died. If you can hear the fan running, blow out the fan exhaust port in the opposite direction of normal air flow. Especially on lap tops, the heat sink cooling fins become completely clogged with dust. When this happens the processor overheats causing it to run slow and eventually shuts itself down to keep from going super nova. You should blow it out at least once or twice a year. Also, if you use your laptop on the couch or in bed, place it on a hard surface like a cutting board or something similar that will allow air to flow underneath the computer. This will also help prevent dust from the cushions or blankets and such from clogging the cooling fins on the heat sink faster than usual. Remember blow it out in the opposite direction of normal air flow. You want to blow the dust out the same passage it came in through.
If u have a laptop (that's what i found out that toshiba Qosmio is ) then is no problem that the fans stop (as long as the temp. is within the normal working margins ). U might have a setting problem - a bad software, managing the cooling system; - a bad BIOS setting regarding system temperature protection; - or the temperature detectors malfunctions, and must be changed (if possible)