i have a tv that doesnt light the backlights, how should i go about fixing it? Answered
its a 40" Haier LCD TV, me and my dad picked it up at a disposal place, when we brought it home and tested it we figured the tv had some issues with th screen, we feared it might be like the 26" tv we got that just turns on and shuts off.
luckily, it does not have such a issue, i checked and it is just the backlight that has a problem.
and, from further investigation, it appears the ccfl's are not getting any power from the inverter board.
the inverter is split into two parts it seems, there is a lrge inverter looking component on the power board which has two wires that connect to the board the ccfls connect to, which has numerous smaller inverters on it. a interesting discovery was that the to wires from the larger inverter piece get bridged when they reach the sub-board.
im assuming its the board with several smaller inverters, because it is getting -12v of power, im not sure if thats normal but ive never seen a inverter setup like this before so its hard to tell. my camera battery is dead at the time of this post but i wil get pictures put up so people can see what im dealing with.
the tv was made april 27th 2009.
it has 8 CCFL's in it, which seems like a lot but im not exactly sure.
so i was wondering what the most efficient way of repairing it would be:
-replace possibly damaged inverter board with a new one
-replace CCFL's with a LED light strip (im leaning toward this)
-replace bad inverter board with a set of replacement inverters (8 in this case)
what do you guys think?