Turns itself on and off every few seconds. The blue light at the front of the TV stays on steadily during this process. Tried unplugging it but made no difference.

Remove the ribbon connectors going from the tcon to panel boards, power the set up and see if it stays on then, you won't have a picture naturally but see if the backlights and sound stay on.

It might be bad caps on the main board.

If you wish to get more details, check this site. Pull up older posts there. Check the site with patience, as it has over 2200 posts now. All are related to electronic equipment repair help.

I also had blown capacitors on my power supply. You can see when they're bad: the tops split or bubble up like a dome. I changed most of the caps, just to be sure, and it fixed the problem. Careful of the larger capacitors. They stay powered for some time and can shock you pretty badly. Good Luck

Bad TV - Possibbly bad mother board. Need professional repair.

what's wrong with my Sony trinitron XBR tv's timer

you need to change your trigger circuit

It sound like you have a bad picture tube...check your 1k circuit for correct voltage and wave form.

hi nel2874

so, you have a television that turns off immediately after you turn it on.
It sound like your power supply on the unit is out. Because I don't know the value of your unit I cannot comment on replacing the unit. But I would recommend that you use our website to find a Flat Panel TV Repairman near you. You may want to call to get an estimate on replacing the power supply before considering replacing the unit.

i have seen this before and it may be the front power button being stuck and when your remote turns it on the stuck button turns it back off again. I have an older mitsubishi that will not boot up right sometimes and i have to unplug it and plug it back in fot it to come on. I used to pick up broken tv and fix the power buton and resell them