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2 TV 's power surge maybe

Have a LG 47LB650V and a LG 50LB650V. next to each other ( I know I'm a geek ) Story so far.....47" powered up and the 50" in standby mode. Heard a pop from what turned out to be a hard drive power supply on the other side of the room ( not connected physically to either TV ) and at the same time the 47" TV flashed up 'No Signal'. Thought it was just an aerial fault ( communal aerial) turned on other TV and that one comes up with the LG lifes good logo, screen goes blank and i can hear a few clicks then nothing. I tried a full reset of the 47" and it comes up with a pinkish/orange speckled screen before it runs through its setup pages. ( My location, wifi settings etc) Gets as far as tuning channels and even after an hour its still found not one channel. Is it worth swapping power boards to see if the different faults transfer across of could I do more damage

Update (06/02/2017)

addendum. it 47" finally finished finding no channels at all. All functions seem to work ( apart from no channels found) Ran smart share on it to watch a film from my computer and regardless of video clip played I get the pink screen and no sound.

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Pete "Is it worth swapping power boards to see if the different faults transfer across of could I do more damage" sure you could try that. Concern I have is that this "with a pinkish/orange speckled screen" is not usually a power board failure. I think It would help if you focus on one TV after you try changing the power board. Let us know which one you opt to go for first and give us the complete list of what it does or does not do.

While you are messing with your boards, check for obvious damage like failed caps (leaking, bulging etc.) Post some images of your boards (1 TV only so we do not get confused) with your question. Use this guide Adding images to an existing question for that.

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Sorted. no signs of damage on either power board. no popped caps, no popped anything in fact. Turns out both TV's had a main board failure not a power board failure. Quoted £190 (US $245 ) from LG for a replacement board (EACH). Bought replacement boards for both from a well known international auction site (Eb**) for a total cost of just over £40 (US $52). Took longer to update them to latest software versions than it did to fit them.

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