PC reboot by itself

Check your power supply, and the connections to the MB. Also if you have a soft on switch, check that..
Make sure the MB is not grounding itself to the case.
teki

Sounds to me like you have an intermitant power supply problem. Keeping in mind that Windows is booting up in safe mode because of the incomplete boot up OR the improper shut down that the computer is doing.
Power supplies can have various problemsand can act ok for a while, the start giving problems without any notice. Depending on the component failure, it seems as though your power supply may have a cracked resistor in it, which can make and break contact, depending on the temperature in the power supply itself.
Power supplies are cheap enough, therefore I don't suggest trying to service it, as there are components that store electicity in the power supply, even when the unit is unplugged.
Be sure to get the appropriate wattage supply, keeping in mind not only what the computer manufacturer recommends, but also all the add ons that you may have installed yourself.Good Luck.....REF.

This might be the effect of the power management.You can try to disable the powermanagements facility.
go to
start-setting-control panel
in control panel look for power management.
change the entities to never.It might help.

There isn't a point for you to look at the bios as the operating system have supercede/ took control of the command in the above power management that i am referring to.
Gd luck!

I have had a simular situation with several pc's either hanging or rebooting all the time. The pc's were all the same with the same parts (built pc's). A friend also told me posible power supply or one of the parts. I knew it wasn't any of those but interchanged parts and power supply anyway. While I was doing all that, I felt that the hard drives were running extremly hot. Good HDs but hot. Excessive heat can hang or reboot a pc. I bought $5.oo internal fans that goes either in the front or the back ends of the inside of the pc. That fixed all the problems.

Hi
It could be any one of these:
1- Power suply malfunction.
2- CPU over heat (check fan)
3- BAD CPU (check another one)
4- Motherboard (check CPU on onther motherboard)
5- CMOS battry.

Good luck
Mohamed

Hi
It could be any one of these:
1- Power suply malfunction.
2- CPU over heat (check fan)
3- BAD CPU (check another one)
4- Motherboard (check CPU on onther motherboard)
5- CMOS battry.

Good luck
Mohamed

Today I test the pc again after changing the power supply unit, and unfortunately the problem still persist. The monitor will flash orange light when the CPU is booting up. And after several attempts to boot up, the monitor indicator light flash with green colour but then turn to orange colour again as the CPU is rebooting again. This happens for 4 to 5 times before the system able to boot up with windows screen. And the system reboot again until it is able to boot up in safe mode. After restart the system from the safe mode, then finally the system is able to bootup in normal mode.
Pls advise as I need help desperately.

Thanks.

Ghost! Gremlins! The electric company is mad at you!

Ok, those might not be what are causing your problem. I had the same thing happen to me, I was really afraid because my system kept rebooting by itself. After calling it a few names and having a few weekend TECH buddies, "who only helped drink my beer", look at it. I all but gave up.

Then one day, I was looking at the mouse cord, it was damaged from me moving it back and forth on the table. It had shorted out and was causing my system to reboot. I was shocked by this and thought about how it only rebooted when I did this,"meaning moving the mouse to a certain part of the table."

Sure enough it had damaged the mother board by shorting out all those times. So I gathered up all the beer cans and grabbed my purse, went out and bought a new mouse & mother board. So as you can see the term MOTHER BOARD refers to it being a female. It didn't take much to short it out but it took a lot of beer cans to get another.

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