Temperature sensor The computer shuts down 10 sec after it's been started. Power supply is ok. Everithing is cleaned inside...

SOURCE: My computer shuts down after 3 secs

Try to separate the power cord of your monitor from your system or maybe if your using UPS(uninterrupted power supply) directly plug the UPS to the wall outlet. either you can use pretty voltage regulator to the regulate the AC power.
if not solve the problem try to examine the your system power supply.

SOURCE: Compaq Presario sr1000(sr1430NX) will not stay powered on

Hi!

Please check for the cables coming into the motherboard from the power supply. Also try and check for any loose cables.

If that doesn't help then please get your power supply changed as its faulty.

Please rate this solution.

Thanks
Rylee

SOURCE: come on, boots up, then shuts down 5 - 10 minutes later.

check your power options make sure you don't have hibernation enabled, its in the system control panel. try booting from a linux live cd like Ubuntu which you can download for free. If it runs fine under linux, its a windows problem, if it keeps shutting down its a hardware problem. Could be bad ram, or CPU overheating.

SOURCE: I have a Gateway Profile 5.5 all-in-one PC. A few

Personally I'd try applying some more thermal paste to the top of the processor.

SOURCE: power supply fan control partially failed. fan is

i guess u r a professional..as u r handling power supplies..
u point of view has always a priority, in such case u gotta replace the fan..

however, the problem of system shutting down suddenly has many more reasons too..check the following:

1) the smps itself may b defective/faulty..check the outputs of smps viz. 0v (black~ground); +12v (yellow); +5v (red, green~ps-on, violet~pg & grey~sb); -12v (blue); -5v(white); +3.3v(orange)..
the 'oscillator and error amplifier ic', or pwm switching regulator circuit..look for defective protector-transformer/resistance(esp 4.7k)/mosfet..

2) if itz not the smps, then it must b ur main/mother board..see with a debug card for mb error..may b short..look for defective capacitors(esp above 1000mfd)/mosfets..go through the mb's south bridge n the circuit lie around atx connector....

3) remove/clean dust neatly..dust is non-uniform in nature n may cause jam/short circuitry/excess resistace n many more..resulting an increase in heat..

4) open the CPU Heat-Sink with fan out of the socket..put some "Heat Sink Compound" (available in local electronics chip level spare market) between the cpu/processor and the CPU Heat Sink *** fan..resit/fit it tightly in position..

5) see if the ram(s) is loose/faulty..open clean/remove carbon & or oxide formed on the teeth with an eraser n resit it..

..plz give higher priority to step2 (as listed above) CAREFULLY..

always better to seek advise from ur system admin/vendor....

Testimonial: "The fan is OK, checked on seperate PS. Good thoughts though!"