Vizio E500AR No Power

[Kildar]

Re: Vizio E500AR No Power

With 20V DC and probes touching where illustrated I still have a reading of 0.

Is there a separate 5V standby or were you referencing the 3.3V?

[Kildar]

Re: Vizio E500AR No Power

Voltage at the main caps proves the fuse is good and the rectifier diode is working, therefore power should be present to run the stand-by circuit. If you have no stand-by voltage then you will have a TV that appears dead.

Stand-by runs the minimum functions of the TV so commands from the user can be recognized and processed. No stand-by volts = no happy

TV that 'appears' dead.... and for all intents and purposes is?

I imagine that with nothing connected the issue would then be with the PSB?

[DXseekerMO]

Re: Vizio E500AR No Power

STBY voltages is 3.3 in some TV's and 5V in others. Go by what is on your board, prolly says STBY_5V or similar?

[DXseekerMO]

Re: Vizio E500AR No Power

TV that 'appears' dead.... and for all intents and purposes is?

I imagine that with nothing connected the issue would then be with the PSB?

It appears dead, but there is voltage present not detectable without service. If it were totally dead the main AC fuse would be popped.

The stand-by circuit upon the power supply board is faulty, at a minimum.

[Kildar]

Re: Vizio E500AR No Power

Yeah, pic confirms it's 3.3VSTBY

[DXseekerMO]

Re: Vizio E500AR No Power

At this point you are looking at either component repair upon the current power supply or replacing it with a good one. Have you ever done component repair on electronics?

[Kildar]

Re: Vizio E500AR No Power

I've done a few charging ports on laptops and whatnot, but given I just bought the board I'm going to do my best to work out getting a functioning board from the seller.

My soldering equipment is also of the lowest quality, so there's that.


I genuinely appreciate the help! I'll update the thread whenever I have something to report.

[DXseekerMO]

Re: Vizio E500AR No Power

There are a lot of good people on this site who's help comes from the heart. They sure don't do it for the money or entertainment value! lol We would appreciate an update when you have one and good luck with the seller!

[Kildar]

Re: Vizio E500AR No Power

There are a lot of good people on this site who's help comes from the heart. They sure don't do it for the money or entertainment value! lol We would appreciate an update when you have one and good luck with the seller!

Bless y'all! Will do, thanks!

[captainKKK]

Re: Vizio E500AR No Power

Yes, I would try to get seller refund first. Do u see any voltage across UM 1,5,6,7? After the power supply board is plugged to 110 ac for 10 min, what is the temp of those aluminum heat sinks?

[dick_barton]

Re: Vizio E500AR No Power

Do you have 3.3 volts DC at the 3.3VSTB pin?

[Kildar]

Re: Vizio E500AR No Power

Good news: Seller refunded both boards w/o me having to send them back.
New powerboard was half as much, so saved a bit of money there.

New powerboard works! Hell yeah!

Bad news: Picture isn't. (see picture of picture).


I tried both mainboards and both sets of ribbons (have two of each now) to no avail. The picture remains nearly unchanged (came through a little clearer but with the same fragmenting).


What's my next step?

[Kildar]

Re: Vizio E500AR No Power

Worth noting that I cleaned and looked over the LCD pretty damned closely with a flashlight during the first troubleshoot to ensure it wasn't damaged (to the best of my knowledge).

[budm]

Re: Vizio E500AR No Power

Panel problem.

[Kildar]

Re: Vizio E500AR No Power

Is there any chance of replacing this ribbon? There's some mild creasing in the others but this one is ripped (and I'm assuming the burning is a result).

Replacing the panel?

[Kildar]

Re: Vizio E500AR No Power

Good chance I inflicted this damage when I took it apart all the way. Won't ever know, but lessons learned the hard way!

[budm]

Re: Vizio E500AR No Power

No, you are out of luck.
You need to buy the new screen, expensive.

[Kildar]

Re: Vizio E500AR No Power

I honestly can't even find one.


Appreciate all the help, regardless! Learned a few things along the way!

[Kildar]

Re: Vizio E500AR No Power

Backlighting is really strong. Thinking about putting it back together and using it as a lamp for the garage, haha

[DXseekerMO]

Re: Vizio E500AR No Power

Darn, and I was hoping this would be a winner. Sorry it didn't work out for you.