VIZIO E320-A1... Gets power but no picture

[p2computing]

Re: VIZIO E320-A1... Gets power but no picture

Order placed. Should know by the end of the weekend if this was the proper fix!

[p2computing]

Re: VIZIO E320-A1... Gets power but no picture

The EEPROM replacement was a success!

[p2computing]

Re: VIZIO E320-A1... Gets power but no picture

The TV has been assembled and is working perfectly!

Thank you, Budm! It was very awesome of you to lend your expertise to someone you don't even know.

Thanks so much!

[budm]

Re: VIZIO E320-A1... Gets power but no picture

Thank you for the good news.

[evill]

Re: VIZIO E320-A1... Gets power but no picture

Hi guys, I am new here, this is my first post. I have a Vizio E320-A1 with the same problem. The power light comes on when the TV is plugged in. I cannot turn it off with the remote or the button on the face of the unit. Black screen, no picture, no sound. I read this post and tested it with the same procedure. These are my results.

Capacitor C9810 = 170vdc

Connector CN9902 vdc
ON OFF
1- NC
2- 5.19 5.18
3- 5.19 5.18
4- 5.16 0.09
5- 11.80 12.06
6- 11.80 12.06
7- GND
8- GND
9- GND
10- 11.80 12.06
11- 11.80 12.06
12- 0.09 0.03
13- 0.05 0.03

My Power Card is Part Number DL621XX04Q, my Main Board is TXDCB02K030002Q

On the main Board I only see EPROM U402 and U408. Shopjimmy only lists EPROM U403 and U409.

With my symptoms and test results, would it be safe to assume it is an EPROM problem? I would probably just order the main board from Shopjimmy, I do not feel comfortable enough to change the EPROM, too small for me to see well enough.

Anything else I need to check?

Thank you in advance,
Ed

[mustangokie]

Re: VIZIO E320-A1... Gets power but no picture

I have a Vizio E320-B0. I am not seeing a lot on the forum about this specific model and wondering if it is the same as A0? I too am having a power problem, but I don't get a light or anything on my set. It was on and working, then went off. I get power thru the cord and to the power board and that's as far as I went other than testing fuse.

[mustangokie]

Re: VIZIO E320-A1... Gets power but no picture

Forgot to mention. My power board is a 0500-0614-0400 and my main board is a 3632-2492-0150. Any help in testing to determine what needs to be replaced is appreciated!!

[budm]

Re: VIZIO E320-A1... Gets power but no picture

@mustangokie:
Please start a new thread with model E320-B0.
Also post good clear pictures of the board, we will start checking the Voltages of the power supply board first.

[mustangokie]

Re: VIZIO E320-A1... Gets power but no picture

Ok will do. My account is brand new so I'm waiting to be activated. Thanks!!

[shphillips]

Re: VIZIO E320-A1... Gets power but no picture

Hello. Very helpful forum and thread! I was also able to diagnose and fix the bad EEPROM problem with my Vizio E320-A1 TV following the thread info. In my case the problem was intermittent. The backlighting would not properly power-up maybe 50% of the time. Would unplug the TV for 20 sec, then wait another 20 sec after applying AC power before cycling the Power button. Eventually it would power-up OK. My TV is used with a cable converter box and the cable box must be disconnected or off for the power cycle trick to work. I suspect voltage is being back-fed thru the HDMI input into the TV causing the uP to stay "half-alive", something I've seen in other poorly designed uP controlled units with USB ports. Measuring pin voltages on the power supply board connector in both off & on states is a good test and confirmed the problem (pins 12&13). Ordered a replacement EEPROM from ShopJimmy and installed. Note that they sell several EEPROMs for the E320-A1 model so make sure you match your specific pc board part number. Also, the EEPROM is under the metal shield cover that also covers the uP. It must carefully be removed. It's not a hard swap if you follow good surface mount IC repair techniques. Thanks to BadCaps.net for the good advice.

[Daveyk01]

Re: VIZIO E320-A1... Gets power but no picture

Thank you for the good news.

Budm,

Does anyone have an idea what causes this EEPROM to fail in so many TVs? Is it the part just failing or is it loosing its programming and if so why? What prevents the same failure from occurring again?

Thanks kindly,

Dave

[XwarlockX]

Re: VIZIO E320-A1... Gets power but no picture

Hi everyone, if anyone is still here. I have the same exact issue as p2computing, as I have a Vizio E320-A1 and the same symptoms. I have checked the pins as previously instructed and came up with the same voltages, and had 0 Volts on pins 12 and 13. So my question would be how do I know which EEPROM is the culprit? P2computing said his was fixed with the replacement of U409, but shphillips said that its under the metal shield. I am just confused as I havent removed the shield yet and I am looking for guidance.

[budm]

Re: VIZIO E320-A1... Gets power but no picture

There are many versions of this model E320-A1.
See here to see which one you will need:
http://www.shopjimmy.com/catalogsear...=Vizio+E320-A1

[XwarlockX]

Re: VIZIO E320-A1... Gets power but no picture

Thank you for the very quick response! I looked up the board from the numbers on mine and it appears that I will need the same U409. I have not soldered one of these before(but I know how to solder), is there any advice you can give me?

[vzolotnik]

Re: VIZIO E320-A1... Gets power but no picture

Hello everyone. This is a great forum. I am by no means an expert but willing to learn how to troubleshoot this with some guidance. I have a somewhat similar issue. TV powers on. I do not get a picture but half of my screen has vertical lines. Based on what I've read, this could be a problem with the mainboard and not the power supply. How do I diagnose this? I hope it's not the actual LED screen.

[budm]

Re: VIZIO E320-A1... Gets power but no picture

Did you try reseating the ribbon cables between the LCD panel and the T-CON board? it looks like the left cable (looking from the front of the TV) is not connected.

[vzolotnik]

Re: VIZIO E320-A1... Gets power but no picture

Did you try reseating the ribbon cables between the LCD panel and the T-CON board? it looks like the left cable (looking from the front of the TV) is not connected.

I've reseated both ribbon cables on the t-con board. The issue is still the same.