Re: Vizio E470VA - No power
Not sure on rectifier. I can check the diodes this afternoon and let you know. Could it be the 5v regulator? (if there is one, i don't know my way around tv power supplies very well)
I see several near the main connector
Duemin
New Member
Last Activity: 03-04-2018, 10:52 AM
Joined: 02-06-2018
Location: Bridgeton, NJ
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Re: Vizio E470VA - No power
13 ohms to ground it folds to 1vdcLeave a comment:
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Re: Vizio E470VA - No power
They were 10uf 50v and 100uf 50v. I can make up a 10 ohm 5w real fast. Do i just shunt the 2 5v lines to ground and measure voltage?Leave a comment:
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Re: Vizio E470VA - No power
I replaced both caps in that area. No change. Same symptoms. =(Leave a comment:
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Re: Vizio E470VA - No power
I will try that shortly. Thanks. It does stay stable as long as there is no load on it from the mainboard. I assume you mean the IC just above the white sticker on the right side of board?Leave a comment:
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Re: Vizio E470VA - No power
With everything connected as it should be. The 2 5v lines to ground measure to about 2.6k each.
With everything disconnected from the main it still behaves the same way.
Watching the +5v upon plugging in the set. It goes to 5.05v , 3.60v back to 5.05 then nothing. All within 1 second or so....Leave a comment:
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Re: Vizio E470VA - No power
Thanks for the reply budm,
yes, 5v is present for only a second when connecting ac to the tv. if i leave the main board disconnected from the power supply the 5v standby stays on indefinitely. as soon as i connect the main it folds to 0vdcLeave a comment:
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Vizio E470VA - No power
Greetings. I have the above mentioned TV that shows zero signs of life.
Here is what i have found so far:
Upon plugging it in the front Vizio logo glows white for approx 1 second.
I checked the psu for the +5v standby and nothing. No voltages on any pins going to the mainboard.
If i unplug the mainboard, +5v Standby is indeed there. Plug in the main and the logo lights up, +5v goes away, no relay clicks, Nothing. Just dead.
Would this be considered a faulty main? I really cant afford to replace the entire board so I am looking for any insights... -
Re: New Members - please post your introductions here
Hello Everyone. It's great to see a forum like this.
I am a ham operator from NJ just trying to learn to repair Tv's. Your forum has provided tons of useful info.Leave a comment:
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