AOC 1 second display

[winboxes]

Hi,

I have a 27 inch AOC Lcd Monitor/Tv. When powered on it displays the screen for a 1 second or less and then goes blank. The led power light remains green. I took a torch to the screen and could not see anything.

Open it up and all the caps on the inverter/powerboard looked good. There was no buldging but there was one that was suspicous. Changed all four of them. Checked the fuse and it's good.

Checked the backlights. 7 of them and they all light up during the 1 second or less. None that is blown.

Powered on and still no go.

Would really appreciate it if someone could provide some suggestions on what I should look for.

-Mark

[arneson]

Re: AOC 1 second display

I'd be looking for other fuses, very very small surface mount ones.
Should be marked on board with an F number and most of these seem to be green.

[winboxes]

Re: AOC 1 second display

Thanks Jim, I've looked at the board again and there only appears to be one fuse the 5a bus fuse. No others.

When powered on, i can hear a slight buzz from the inverter board even after the lcd goes blank.

[arneson]

Re: AOC 1 second display

Speaking of sounds, leave the inverter unplugged and try for audio.
The last set I looked at like this it was in fact the audio amp section that had shorted.
It displayed the same symptom.