Just watching the TV when w e had a loud pop then no picture. Removed back, checked fuses - mains OK, but left hand of 2 fuses on panel next to one with mains fuse was blown. Replaced fuse and turned on, then another loud pop. This time both fuses still OK but no picture. Any thoughts?
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Re: No Picture on LG 42PX5D
You will have either a fault with the Y-Sustain board (this I would assume from your description is the board you changed the fuses on) or the buffer board which is the long panel to the left of this board. It is probable one of the drive ICs on this board has blown & a replacement board is the best solution.
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It can't be fix by replacing the fuse alone because the IC's and other parts are already faulty. You need to replaced the entire Y-sustain board. Try this LINK or obtain it from your local LG Service Centers.
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Hi A common problem for these is bad capacitors in the power supply, Remove the back from your TV and look at the power supply on the left hand side.
You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed. This will cure the problem as they overheat being sat next to a heatsink that gets very hot! Try and change them for the same 3300uf but a higher voltage. Hope this helps
Unplug the tv from the mains, take the back cover off, they will be a few screws in take out and the cover should gently prise away Once the cover is removed check the boards for fuses 1 of them is probably blown, use a multimetre with continuity capabilities to test the fuse, if blown it will need to be replaced, you can buy them in most electronic stores ie Maplins.
If the fuses are fine and still a problem check the capacitors on the power board, they are barrel shaped componants with a silver top, check for any brown liquid resadue on the board surrounding the componants or on the caps themselves, also check that the tops of the capacitors are completly flat, if not and there is a slight dome or pretrusion they will need to be changed. Good luck and post back your findings. cheers.
Our LG 50" plasma tv screen went black after a popping noise but still had sound, after great diliberations decided to take the back off and have a peek!
We unplugged the tv and tested the fuses (there were three we could see) one had blown, the one on the left as you look at the back of the tv it also has one above it. We wrote the code/seriel number down and took the fuse to the electrical wholesalers Maplin and bought a pack of 10 fuses for £1.29 replaced the fuse in the tv and everything now fine!!!!!!
Hope this might be of use to anyone whose lost the picture after a loud popping/snacking noise but still has sound.