I need your guy's help. need any technical info available for Viewpia LCD TV's

[mbates14]

hmm. never had to supply any of that information before. but the last time i used the site was in 2002 also.

[freakaftr8]

I may or may not be of help here but I would monitor each section off the filter caps for voltage indifferences against a working one and one that is intermaiitant or failed. I know this may be diffucult considering the tv has to actually be powered up to do so but im under the impression that you sould check these units for inherent cooling issues when the board is in operation. Im one of those to think you may have a cold solder joint somewhere too. Have you tried holding down one or more buttons as you plug the tv in to see if you get a dim standby light? I know it sounds dumb but have you tried unplugging the button strip and power the set up via remote?

[MRX37]

Originally Posted by freakaftr8

I know it sounds dumb but have you tried unplugging the button strip and power the set up via remote?

The problem is fixed by swapping the chassis board for a known good one, not swapping the button panel.

I'm going to hunt for cold solder joints probably tomorrow.

[MRX37]

An update for you guys:

I'm now sure it's the heatsinked IC chip that's causing these to fail. I found one with definite bad solder connections, and if there's one...

Problem found, now just need a way to resolder these tiny tiny pins.

[mbates14]

As i explained, use a hot air rework station with small tips plus some solder paste.

[MRX37]

Originally Posted by mbates14

As i explained, use a hot air rework station with small tips plus some solder paste.

You're right, but I don't have one.

See, money and time come into play here. Christmas is coming, and things are getting busy, so I don't have hours to spend re soldering tiny pins with equipment that we don't have and that I have never used before.

What we'll probably end up doing is somehow forcing our friends in China to either step up their quality, or at least send us new boards.

Now that I know what to look for, I can at least let them know that we know.

Hm, those rework stations aren't that expensive. It's something I'll keep in mind. if the problem worsens, I may be able to convince them to get one.

[jeyurkon]

There are also re-work stations with small conventional tips that you can use with small gauge solder. While I prefer the hot air, others I know prefer the tips. I think the prices are about the same.

John

[MRX37]

Just using my soldering iron, I brought one of these boards (partly) back to life. the thing will power up and display video, but no audio.

I plan on using my finest soldering iron tip and see if I can bring another one back to life within the next few days.