Re: LG 47v550t possible panel failure?

Ok bezel off and tabs exposed.....hmmm its quite clear from looking firstly at the metal surround scorching looking closer at the tabs a couple of the tabs have actually burnt out on some of the lines, looking at it there is staining on the metal surrounds which could be liquid or resin residue from the melted parts of the tabs, possibly gotten in there. Bottom line major panel failure, a real shame it's a nice 3d smart TV. But hey it was free and adds a bit to the knowledge will salvage some boards and scrap the panel.

Re: LG 47v550t possible panel failure?

I'm gonna strip the bezel off and check the tab bonds, what threw me was the fact that the part image of the tv menu and the no signal LG logo was backward.

I salvage this 47" LED LG LV550T it was displaying black and white lines my initial thought was tab bonding issues or connector ribbons to the tcon and panel.
I fired it up quickly and noticed that in one of the strips the tv menu was displayed but polarised and backward. I left the set on about to do some checks cables seated properly etc looked back at the screen and noticed the picture completely gone, backlight still on but nothing no lines.

Tcon chip was ridiculously hot so assuming it had failed I ordered a new tcon which I got for pennies I've installed the tcon...

Re: LG 47LG5000 Blown Resistor

I've tested all the power outputs from the powerboard and also replaced the blown resistor. All the voltages are present. Their is power going to the mainland I can also see the optical output is shining red. I'm starting to wonder if the fault is on the mainboard.

Re: LG 47LG5000 Blown Resistor

That wasn't what I was implying but thanks anyway

Re: LG 47LG5000 Blown Resistor

Thanks Tom for the info, looking at the location it was my assumption that it had suffered from a surge. When you switch the set on the red led blinks then goes off, I figured the TV was powering off because it detects a fault namely the resistor. I wouldn't be surprised if the Tv has received a surge from the power supply, I used to live in the town where I picked it up, very old houses used to sufferer from blown gear all the time myself.

I picked this 47" LG LCD TV [B][I]model 47LG5000 [/I][/B]up recently, it wont power on, the red power led blinks then powers down. I've removed the power board checked the caps nothing obvious there but as you can see from the pics a resistor in the bottom left of the PSU board has blown. I don't know what the history of the TV was ie it's behaviour before it blew. I'm having problems identifying the resistor, I'm also interested in the more expert opinion on why this resistor has blown.

The caps look ok but that doesn't mean there not bad, I've fixed a few LCD's in the past...