Vizio E552VLE Not Turning On

[tonelope10]

Hello Group,
My TV is just over 2 years old and for the last 3-4 months its been hard to get turned on, progressively getting worse. It has the orange colored Vizio emblem on the front when not turned on which is correct. When it is turned on all that shows on the screen is the big V on the start up screen. About 1 out of 10 it will come on correctly after a few seconds of the V screen and work perfectly for however long its on, but its becoming more infrequent. Also, it wont turn off without the power being disconnected. We have begun just unplugging it back and forth until it works properly and leaving it off when not in use.

I have removed the backing and can take pictures this evening and add them if needed. To the untrained eye everything appears normal to me but I know nothing about what I'm looking at. I looked for rounded or bulging resistors and saw none. The one fuse that I found (250v) is not clear, it is a milky color but this could be normal for all I know. Does anyone know what the likely cause could be?

Thanks!

[budm]

Re: Vizio E552VLE Not Turning On

Yes, we always do need good clear pictures of the back side of the TV and the boards for start.

[keeney123]

Re: Vizio E552VLE Not Turning On

BudM seems like the same problem as another person that could not turn off there Vizo TV where after jumping S to D of U21 the picture came on and then something shorted out. If this is the same main bd. it might save time to just go to the input and output and gate of U21?

[budm]

Re: Vizio E552VLE Not Turning On

That U21 in another thread is for powering the T-CON circuits on the main board. I have no idea what he has on this 55" TV.

[tonelope10]

Re: Vizio E552VLE Not Turning On

Please let me know if thesese pictures help. It is a E552VL model.

[Agent24]

Re: Vizio E552VLE Not Turning On

The one fuse that I found (250v) is not clear, it is a milky color but this could be normal for all I know.

It's a ceramic fuse, they are white, that's normal. Only clear glass fuses typically change appearance when blown - they usually go black or silver.

Besides, if the fuse was blown the TV would get no power and wouldn't work at all. The fact that it works sometimes means the fuse is not blown. (Of course, a fuse with a loose fuse holder or such could cause intermittent problems, but that is very unlikely to be the case)

[tonelope10]

Re: Vizio E552VLE Not Turning On

Does anyone know what might possibly be the issue?

[budm]

Re: Vizio E552VLE Not Turning On

Pictures are way out of focus (please look at your pictures, if you cannot read any labels on the board then we cannot read them either), I cannot read the model number on the board or the labels next to the whites connectors on the top right.
Also need the pictures of the backside of the TV so we can see how all the boards are connected together.

https://www.badcaps.net/forum/showthread.php?t=39740

[keeney123]

Re: Vizio E552VLE Not Turning On

If you are using a digital camera see if you have a macro setting and switch it to that for close up pictures. Yes, the pictures need to be clearer. BudM It will be interesting to see if it is the same set up as the other Vizo with the same symptom.

[tonelope10]

Re: Vizio E552VLE Not Turning On

I hope these help. My wife is getting irritated with our dismantled TV and this is my only hope haha. I can take more pictures if needed.

[budm]

Re: Vizio E552VLE Not Turning On

OK, I found the good pictures of your DELTA POWER SUPPLY 0500-0507-0790 (DPS-321AP).
When the TV is not working, you need to verify that you do have >2VDC on the PS_ON pin of CN201 when the power switch is activated. If you do have PS_ON, then check and see if you do have 12VDC on CN201, 18VDC on CN204, 24DVC on CN202.
Also report the DC Voltage of A, B, C on CN202 when TV is OFF and when TV is turned on.
You should also verify that the backlights are on or not when it is not working, you may have to look at the back side of the panel in the dark to see if they are on. We need to know if you do not see the pictures on the screen is due to no backlights or the T-CON board is dead.
http://www.shopjimmy.com/vizio-0500-...upply-unit.htm

[tonelope10]

Re: Vizio E552VLE Not Turning On

I apologize but I am very new to this stuff. I have a volt meter but I'm not sure how to use it to test the areas you are asking. The backlights have to be working because when I power on it goes to the V screen and the back of the TV is all lit. Would you mind walking me through how to test those places you asked about?

[budm]

Re: Vizio E552VLE Not Turning On

Do you have user manual for the meter?
So you are saying that the backlights are on but no pictures on the screen?

[tonelope10]

Re: Vizio E552VLE Not Turning On

I do, its an E Tek10709. The TV turns on and gets stuck on the opening screen which is a big white V on the screen. If you turn it on and off enough it eventually goes to the HDMI input and works perfect.

[keeney123]

Re: Vizio E552VLE Not Turning On

I would concentrate on the meter manual that has to deal with Voltage and Ohms and learn these before you take the measurements. Also, stick to the section of the TV that BudM ask you about as there is other places on the TV that have very high voltage. There are also, videos online that will teach you about the different settings on the meter such as V (AC), V (DC) and Ranges volts, (m) volts, (u) volts. Ohms represented by the Greek letter Omega and ranges, Ohms, (K) ohms, (M) ohms. Good-Luck

[ecking767]

Re: Vizio E552VLE Not Turning On

I do, its an E Tek10709. The TV turns on and gets stuck on the opening screen which is a big white V on the screen. If you turn it on and off enough it eventually goes to the HDMI input and works perfect.

this sound like an EEPROM problem if your TV is freezing on the "V" logo, does it become unresponsive? and you must unplug the TV to power it off?

[tonelope10]

Re: Vizio E552VLE Not Turning On

Ecking that is exactly what happens! What do I do?

[ecking767]

Re: Vizio E552VLE Not Turning On

Replace the main board

[tonelope10]

Re: Vizio E552VLE Not Turning On

Looks like those are $150-$200, not sure if I should just get a new one. Are you fairly certain that would fix the problem?

[tibimakai]

Re: Vizio E552VLE Not Turning On

It sounds like an EEPROM issue, but I don't see any for sale. So maybe it's not an EEPROM issue.
I would measure the regulators on the mainboard.
I have a E371VL and I have replaced the EEPROM, but did not repair the issue and one of the EBay seller, is selling a kit for this TV and I have found out, that in that kit, there is no EEPROM. There are three regulators and two smd fuses.
The regulators have three pins on one side and a wider one on the opposite side.
http://smg.photobucket.com/user/Simo...F9SMD.jpg.html