Power Supply Problem?

Hows everyone doing? I have a problem. I was on my other computer this morning and i had to go mow the grass, so i simply just left it on. I came back down to my basement (where my computer is) to find that it's turned off. I try turning it on, no luck. I open it up, clean some of the fans, i change cables and again no luck. So now i'm thinking that this is a power supply problem. Can anyone confirm or give their opinion? I have a warrenty so i can go change it. BTW my power supply is 430W but i do not know the brand. I got my computer from LG so, might it be LG?

 

*Sry for double post, i don't see an edit option. I have also tried plugging it into different outlets and no luck. Also in my first post, where i said "i changed cables" that means i changed the cables the run from my PSU to my outlet, nothing inside.

 

When you say 'No Luck' what do you mean, can you tell us exactly what happens when you start computer, do you get any post beeps, anything on the screen at all etc. it would help if you were to give us a bit more information.

 

Agreed.

However, if fans DO come on, you can test the power supply with a multimeter. If you're using the ATX form factor (it will typically say so on a sticker on the PSU), setting the multimeter to 20V range and placing the red lead in the red wire of an unused power lead should produce approx 5V. Leaving the black lead, and moving the red lead to the yellow wire should produce approx 12V.

BE SURE YOUR MULTIMETER IS IN THE VOLTMETER SETTING. (the red lead should be next to a V label) If you accidentally do this on the ammeter setting (measures current), you will short your computer, potentially doing harm.

 

Umm nothing... it doesn't turn on at all.

 

Your options here are really limited.
I would first try to disassemble everything, and reseat it to ensure that nothing has come loose. If that fails you could try another power supply in the machine. If that fails, I would read through the motherboard's manual, and ensure all DIP switches and jumpers are in their proper place. Failing that, replace the mobo.

Then, if you're REALLY ballsy, or rich, you could try the PSU in another machine. That's VERY risky though, if the PSU is faulty, you could fry another another board.

 

Before you strip it down,disconnect it from the AC,find the cmos jumper and set it in the reset position for 20 secs then replace,or failing it has one,remove the cmos battery for 20 secs then replace and give it a whirl.

p.s you can find out the position of both in your motherboard manual

 

Alright, thanks i'll give both suggestions a shot. I'll reply a bit later with the news.