My computer turns off and on by its own,it turns on when i put the power plug and turns off in some

my computer turns on when i put the plug and turns off itself. i dont even press the button in the cabinet but it starts by itself, it does not even show the boot procedure. i gave it twice for repair, when i bring it back it works well again it goes off some time later tommorro, i dont know why

My computer turns off and on by its own,it turns on when i put the power plug and turns off in some 5 sec?internet security 2006

Go to bios by clicking F2 or del button while restarting

Then in power option select ..after power failure select STAY OFF

This will definately help u

My computer turns off and on by its own,it turns on when i put the power plug and turns off in some 5 sec?microsoft

Plz understand that your PC turning off by itself is not very strange... Many computers that have an ATX cabinet can turn off by themselves whithout you having to push the power button. What is strange is that your PC just turns off after sometime without you doing anything. In all probabilty, it is a virus/malware infection. Have it looked over by a good qualified technician.

Problems with hardware cannot be ruled out either. If your fans are not working properly, the CPU may overheat (this problem is worse in summer and in hotter climates) causing the computer to turn off, stop responding or the monitor going blank. Have this looked into.
Try changing the power supply with a higher wattage
Yeah check your power button to see if its pressed or for a short circuit in the wire from the power button to the system. Or else it has to be a faulty power supply box . I suggest you take it down to another person for the repair. I had this problem once in my system, then i found out it was the power supply. Hardware problems are really hard to rule out without visual inspection so best is take it down to a store and give a clear description of the problem.