Help! Who's at fault the Motherboard or Powersupply?!

roxxar · 05-31-2008, 03:56 PM

The problem: When I try turning on the power the computer does not turn on fully but instead everything turns on for a second and shuts off.

- I tried disconnecting everything and plugging it back. Surprisngly, the computer worked and turn on fully. But when I disconnect the power plug and plug it back, and turn it on the computer does same thing. Turns on and shuts down.

- I assumed something was wrong with the power suply. I noticed that the power supply had a voltage switch to change the amount of voltage. I live in canada, so I switched it to 115 v, however when i press the power the computer did not turn on. I switched it to 330 v or soemthing around there, and the computer TURNS ON! BUT I noticed that the mouse and output screen had no power flowwing through. While it was running i switched it back to 115 v and the mouse and screen worked!?

The only way to get my computer turned on is to do the same thing switching voltage on the
1 minute ago - 3 days left to answer.
Additional Details
1 second ago

power supply.

Do you think it is becuz of the powersupply or motherboard? If it is becuz of the Motherboard, do you think i need to change it. The motherboard is working fine, when it is on.

Tumbleweed36 · 05-31-2008, 08:03 PM

First of all, make sure if your country uses 120 or 240 volts and don't switch your power supply back and forth or you may fry your components if you have not already. Put the switch for the proper voltage and leave it there.

Then, take this unit out and troubleshoot it like this on the bench:

Bench Test Your System

05-31-2008, 03:56 PM	#1 (permalink)
roxxar Registered User Join Date: May 2008 Posts: 1 OS: WINXP	Help! Who's at fault the Motherboard or Powersupply?! The problem: When I try turning on the power the computer does not turn on fully but instead everything turns on for a second and shuts off. - I tried disconnecting everything and plugging it back. Surprisngly, the computer worked and turn on fully. But when I disconnect the power plug and plug it back, and turn it on the computer does same thing. Turns on and shuts down. - I assumed something was wrong with the power suply. I noticed that the power supply had a voltage switch to change the amount of voltage. I live in canada, so I switched it to 115 v, however when i press the power the computer did not turn on. I switched it to 330 v or soemthing around there, and the computer TURNS ON! BUT I noticed that the mouse and output screen had no power flowwing through. While it was running i switched it back to 115 v and the mouse and screen worked!? The only way to get my computer turned on is to do the same thing switching voltage on the 1 minute ago - 3 days left to answer. Additional Details 1 second ago power supply. Do you think it is becuz of the powersupply or motherboard? If it is becuz of the Motherboard, do you think i need to change it. The motherboard is working fine, when it is on.

05-31-2008, 08:03 PM	#2 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 19,658 OS: XP Professional	Re: Help! Who's at fault the Motherboard or Powersupply?! First of all, make sure if your country uses 120 or 240 volts and don't switch your power supply back and forth or you may fry your components if you have not already. Put the switch for the proper voltage and leave it there. Then, take this unit out and troubleshoot it like this on the bench: Bench Test Your System __________________ ---------- I don't receive email notifications of replies to subscribed threads. (Internet provider policy) Therefore, if I don't respond to your post within 24 hours, please send me a reminder PM and include the link to your thread.