Is there a way to repair and test without a TV to test in.

[lookimback]

I'm figuring there must be a way to do this. I can't imagine places like Moduslink and others having a thousand test TVs taking up shop space. Power supplies are easy, but what about main boards, Tcons, sustain boards, etc?

[keeney123]

Re: Is there a way to repair and test without a TV to test in.

I would say Bud M would be the best to advise. I would think one would break each section of the TV down and find what needed to be powered to get just that board that you what to work. Bud M's site LCD TV and Monitor basic troubleshooting guide is a good way to start as that is on going. Of course different manufacturer do things in different ways so that is something one has to consider when repairing different TVs.

[lookimback]

Re: Is there a way to repair and test without a TV to test in.

I know I've been able to test many main boards on different TVs which used similar boards. I've also been successful testing main boards in larger TVs which use the same board, but different firmware. Sometimes that works but just doesn't fill the entire screen. I'm thinking it would be possible to remap the lvds to a different panel/tcon if the signals are universal. I'm sure I'd have to accommodate for voltage differences though.

[tom66]

Re: Is there a way to repair and test without a TV to test in.

Yes, with an oscilloscope you can check LVDS signals and verify basic main board op, but no substitution for real test. Sustain boards can't be tested without the complex waveform generator that is the control board.

Power boards are the easiest and can be tested under load.

ModusLink to seem to test in live chassis - at least one photo on their website shows lots of TV chassis.

[lookimback]

Re: Is there a way to repair and test without a TV to test in.

What about remapping lvds to a different panel, assuming you had the data sheets and could determine which signals went where. Would that work, assuming the displays were the same size? My idea is to have an assortment of test boards which would connect between the stock lvds cable for the boards I want to test, and the stock lvds cable for the panel I want to test in. The board would just reroute the signal pairs to map them to the panel, and also make any necessary voltage adjustments.

[tom66]

Re: Is there a way to repair and test without a TV to test in.

I would imagine that would simply take too much time to be worth it. Anyway, the LVDS signals will probably be of different formats (bit order, resolution, polarity, even/odd swap, etc.), even if they have roughly the same number of pins or similar pin order.

[lookimback]

Re: Is there a way to repair and test without a TV to test in.

That's what I was wondering. Thanks.