Isis-42-913-led3d

[Russ300]

Hi guys, I'm working on a tv right now and it's baffling me, the power was blown ( vestel 17pw25-4) so I bought and fitted a new one, now it powers up, the back light comes on for a second then it shuts down again ! I swapped out the inverter for a different one and the same fault is happening, there is only the main board ( 17mb65-2) and the t-con remaining, it has an lg led lc420dun panel in it , could this be faulty ?

[selldoor]

Re: Isis-42-913-led3d

Yes - there are more and more threads regarding faulty/damaged/blown bulb
LED strings - seems sometimes 1 bad led and protection shuts it all down.

[selldoor]

Re: Isis-42-913-led3d

budm has put some articles in here which might help you
https://www.badcaps.net/forum/showthread.php?t=25810

[Russ300]

Re: Isis-42-913-led3d

Isn't there a way to override it or acknowledge it and carry on ?

[Shotgun25]

Re: Isis-42-913-led3d

Just for future info and people searching for things that bring them to this thread, I've seen a video where someone replaced a dead LED with a determined value diode to add the load the LED would have previously provided and the rest of the string worked.
You have to get a similar physically sized diode so the string fits in the normal position for this to work, and there was no visible difference from a distance.

[Andrew F. Ali]

Re: Isis-42-913-led3d

Or perhaps you can apply the 'Reecyburger' stacking method to replace the bad LED...

[ReeceyBurger123]

Re: Isis-42-913-led3d

Similar sized diode what ? Size of pad or wattage lol ? Just stack em works good never had a return yet