after a blackout, computer doesn't start up.

i tried diff outlets on my apc surge arrest,
i tried diff main power outlets,
i tried leaving it plugged in for a few hours and then start,

but in end still nothing.

this happened previously before, and i thought it was dead so i called APC to file a claim. the guy told me to try diff outlets on the bar and i did. the result was, the computer worked on other ones.  so they said the bar was faulty and sent me a new one. now the same thing happens and even if i try the diff outlets, nothing happens.

i had a few prior problems with the computer before, such as CMOS screen poping up, but that happened once and like a few months ago. then there was a few times where it would goto the windows screen, but not load the desktop. i restarted it a few times and it followed through and worked.  that also occured like a few months ago and never again.

i own a p4 2.8, 1gb ram, gfx5500, 300gb hd. its about 6yrs old.

i searched the forum and looked for possible solutions, but none of the cases matches mine perfectly so here i am posting.  Remove the APC and plug DIRECTLY into the wall receptacle.i tried that also. this nothing.

however, i do hear a small buzz/whistle noise when its plugged into an outlet, apc or wall.  i figured it was a "charge" but ya.

stiill won't start.Any lights, fans starting up, HD startup, beeps?nothing starts up. no lights or beeps.  the only sound is from when i plug it into an outlet, its like a buzz/humming noise, very faintSee if you can borrow a power supply of = or > wattage and swap it in and see it it fires up........Computer was plugged into the apc surge arrester and computer was on or off when you lost power?  It's beginning to looks like the power supply (psu) is damaged.i was using the cpu when the power went out. it was only for like 5secs and came back on.  but when i tried restarting, it dint' work.  its always plugged into the apc.  i tested the outlets with other stuff like light,monitor and speakers and all works fine.

my friend suggested i check if the motherboard light is on, and it is.

as for spare power supply, i won't be able to get one until maybe tomorrow, and might even need to buy a new one if anything.  just wanted to confirm its the problem before spending.It's not confirmed unless you can verify the buzzing is from the psu.  If motherboard light is on, then part of the psu is still functional.  Do you have a voltmeter and do you know how to use it?i have one, but not 100% confidant on how it works. Quote from: chuchuboi on October 27, 2009, 06:26:33 PM

i have one, but not 100% confidant on how it works.