LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

[Superluminal]

Hi all, looking for some input on this one. I've been reading the forums for quite some time but this is my first time posting for help.

LG 47LV5500-UA
10 years old
20,000+ hours on it.

Watching TV on it last week and right while I was watching the image suddenly started experiencing the symptoms in pics. Rainbow chromatic vertical lines and alignment issues. The issue is uniform across the entire panel. It does not come and go, the symptoms are stable.

Here is what I've tried so far:
- Factory reset and cycle of picture options.
- Pulled the back and cleaned and re-seated every single power supply, main board, and t-con board cable connection.
- Pulled main board and checked grounds.
- Pulled t-con board and replaced with two separate brand new t-con boards.(parts supplier sent me two for $15 so I tried both)

None of this has made a bit of difference. The symptoms remain exactly the same.

SO...it's not the t-con board, and my inkling is it is not a bad cable, as tapping on the t-con cables with the panel on does not make the symptoms change better or worse in any way.

None of the capacitors on the power supply look bad, but I haven't tested them, that's beyond my expertise.

Is it worth the $100 to switch out the main board and see if it works? Is it most likely the main board or is more likely that the panel is bad? Is it worth ordering new cables?

I can easily afford a new TV but I hate our throw-away society and I'd like to fix it if possible but at it's age it is *barely* worth $100(after shipping) IMO to put a new main board in.

Any input or advice is appreciated. Thanks.

[Superluminal]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

Okay update: since posting this I went and pulled the front plastic frame housing off the panel to get to the ribbons. They all appear in good shape with no dimpling or heat damage apparent anywhere. Running my fingernail over each one with pressure does not induce any flickering, worsening, or improvement in the vertical lines.

[Davi.p]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

100% bad cpu soldering, need at least reballing or cpu replacement.

[Superluminal]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

100% bad cpu soldering, need at least reballing or cpu replacement.

So in other words, I should just replace the entire main board, which I actually can do for about $75 it looks like after searching some more parts suppliers.

No way I can get a CPU reball for less than that around here. $125 just to walk in the door and shake hands in terms of labor in my area.

[Davi.p]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

You are very lucky if that board is working, because it's quite cheap for a 3D board (is it?), get that, no mess around.. no, wait, if you have acces to an old electric small oven, that you can use only for no food purposes, you can actually use as a reflow oven, first clean the board with water-soap-brush, then wash it with jet of boiling water, now shake it, put flux around CPU and blow hot air to let flux filter under, now put board in oven, 1 hour at min. temp with door slightly open, then 10 minutes 200C closed, let it cool down with door slightly open..

[nomoresonys]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

I too hate waste, but at 10 years old what's going out next, backlights? too bad they aren't like the old crt tvs that can last 30 years problem free on a regular basis, if this is one of the lg's that are prone to bad mainboards then I wouldn't trust a used one, not worth 100 bucks, might be time for a black Friday deal, I would check lots of reviews first tho, some are pure junk and not worth buying.

[lotas]

Re: LG 47LV5500-UA Vertical Colored Lines/Alignment Issue

Try cleaning the LVDS cables or pulling and inserting the connectors several times from both sides (from main and t-con) and from t-con to the bars (bad contact).