Vizio VO42L FHDTV10A

[ntehicks]

I have a Vizio VO42L FHDTV10A when I turn it on the vizio logo goes from amber to white. I get no sound. but I have done the flashlight thing and see very dim video. I have noticed on the main inverter board that the chip is missing a pin and looks burnt. on the slave inverter it looks normal. on the main inverter when the tv powers up there is a blue led that lights for a short time and then goes out. will the sound return when I repair the inverter or is this a different problem.
Main board U voltage readings
U15 1.72 1.26
U16 11.8 5.06
U17 1.74 1.25
U19 2.5 1.25
U20 1.5 1.26
U21 1.25 1.25

[Mr Bill]

Re: Vizio VO42L FHDTV10A

Was a source hooked up to the tv when you did the flashlight test? Obviously if there is no audio going to the tv from a source then there will be no audio coming out of the tv . That chip on the inverter appears bad with the little burnt hole in it. What is the board number on the inverter. I have a few spare vizio master and slave inverter boards.

[ntehicks]

Re: Vizio VO42L FHDTV10A

tonight I connected up a video source and noticed on the screen that I had to press the input 2 times quickly in order to move through the inputs. I do have sound and video. I have included pictures of the inverter in question. thanks for your help.

[budm]

Re: Vizio VO42L FHDTV10A

Sounds like you have typical inverter failure, PWM IC blew up and shorted MOSFET's.
http://s807.photobucket.com/albums/y...cpZZ1QQtppZZ20

These board will also need modification.

[Mr Bill]

Re: Vizio VO42L FHDTV10A

I just checked my boards and they are NOT compatible with your model.

You can get a repair kit from ebay and do the repair yourself
http://www.ebay.com/itm/6632L-0470A-...item19c2622c67

Or you just get another board from ebay
http://www.ebay.com/itm/LG-6632L-047...item3cc99e027c

I don't know how good your soldering skills are but if the shoe was on my foot i'd probably opt to just getting another board. That 16 pin-ish chip looks a little scary.

[ntehicks]

Re: Vizio VO42L FHDTV10A

I thought I would try to remove and solder a new chip. The hotair rework station works great but looks like there were several traces lifted. I also ordered an inverter and replaced it. The tv is now working.

[jim0717]

Re: Vizio VO42L FHDTV10A

mr bill, new to forum pleased to join very helpful information and great ideas and advice i have picked up on. i narrowed the problem to the blacklight inverter.thx to all that have participated. you did say earlier in thread that you have spare vizio inverter boards and I was wondering if you have a spare 6632L-0481A PPW-EE42VF-0 rev 1.6. and if so how much.

[tibimakai]

Re: Vizio VO42L FHDTV10A

I have purchased from Ebay some new boards(totally different, much newer design) for $38 shipped/total and they work great.

[jim0717]

Re: Vizio VO42L FHDTV10A

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I have purchased from Ebay some new boards(totally different, much newer design) for $38 shipped/total and they work great.

What part numb did you order on ebay? and i assume it was for vizio v042l fhdtv10a. ive seen this part 6632L-0481B it is rev. 1.7 as well as 6632L-0503A. all claimed by shop jimmy.com that are compatible inverter boards. whereas the bad board ( the original part is 6632L-0481A rev 1.6). will the rev 1.7 work do you think? are they better than the original? or should i just stay with the original parts to be safe? just dont know really how different they are and if it could ruin other bords connected to it being different parts and possibly different structural builds. thanks for any info

[tibimakai]

Re: Vizio VO42L FHDTV10A

I've got this style, but they were much cheaper back then.
http://www.ebay.com/itm/New-Inverter...item4601e29db1