I have acquired a non-functional Vizio M50-C1. Previous posts have revealed higher than expected voltages on the 12v pins (recorded at 19v). Mine is the same. LED on main board illuminates when plugged in as solid red. When powering up, it changes to red and blue. The power indicator comes on then fades out as normal. Nothing displayed on the screen even with the flashlight test. No backlights at any time. Remote functions, turning the TV on and off. Power will cycle about every two minutes. From my reading of others before me, it appears to be a short in the main board. Replacing the board will run about $60 plus shipping. Trying to eliminate any other possibilities before I spend the bucks. Pictures can be posted if required.
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Re: Vizio M50-C1 Nothing on screen, no backlights
Yes photos, investigate the 19v instead of 12v. -
Re: Vizio M50-C1 Nothing on screen, no backlights
Image attached.Attached FilesComment
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Re: Vizio M50-C1 Nothing on screen, no backlights
See this link: https://www.badcaps.net/forum/showth...t=Vizio+M50-C1Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
I have read that post at least five times before creating an account and posting my query. I'm fairly confident it's the main board but was looking for any other possible test methods I could try to confirm. Thanks.Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
Most likely mainboard, try with tv unplugged from power, unhook cable from powerboard to mainboard, plug tv back into outlet, see if backlights come on and stay on.Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
Had 2 or 3 threads lately, where the 12 was 19 volts and fault was mainboard.Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
https://www.badcaps.net/forum/showthread.php?t=76708Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
Guys, thanks for the participation. Decided to just get the replacement board and TV is now functional. Would like to know more about deep diving on these boards to identify the faulty part. That probably takes more electronics education than I have been exposed to. Will continue to improve and try new things. On to the next one.....Thanks.Comment
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Re: Vizio M50-C1 Nothing on screen, no backlights
Looks like Mxx-C1 series suffers from BGA failures of the lead free solder balls used on the main processor that crack over time. This problem affects LG LV series, LG LS series, laptops, Xboxes and PS3's. If you took a hair dryer to the processor before plugging it in, then it should have expanded the joints enough to make contact and start up the tv to confirm the failure.Comment
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