Vizio E701i-A3 no Picture

[aaronwt6]

Re: Vizio E701i-A3 no Picture

Hey All,

I'm having this exact same problem. I bought a replacement T-Con board with the proper ZH suffix and put it in today...television worked again for about 2 hours straight then went black again. I'm stuck now as to know what the problem is...bad T-con board again? Something causing the T-con boards to fail? I had read somewhere else that bad caps can cause black screen but I saw no apparent failures on the power board? Another issue entirely that I'm missing? Thanks for any help/ideas on troubleshooting!

Did you make sure the thermal pad and cover were back in place before you ran it? Sounds like it may have overheated.

[bjorkson]

Re: Vizio E701i-A3 no Picture

I got the new Tcon board in and looks like the problem is still there. I think I might have a panel issue, might have to do more testing to find out. Does anyone have a service manual for this Tv set?

[CapLeaker]

Re: Vizio E701i-A3 no Picture

Do you actually have LVDS video coming out of the main board?

[bjorkson]

Re: Vizio E701i-A3 no Picture

no, the backlight comes on and stays on, but no video. I have replaced the main board and also the Tcon board with no sucess.

[triplefour]

Re: Vizio E701i-A3 no Picture

Do you actually have LVDS video coming out of the main board?

how do you test that?

[CapLeaker]

Re: Vizio E701i-A3 no Picture

with my 100Mhz oscilloscope. LVDS = Low Voltage Differential Signal. Remember the signal is small, but you can see the changes on the oscilloscope, when you have the TV on some channel and turn on and off the menu all the time, while poking into the LVDS connector.

[triplefour]

Re: Vizio E701i-A3 no Picture

ahh that reminds me i need to fix up that scope i scored months ago. been so busy!

[Ltank]

Re: Vizio E701i-A3 no Picture

I had one. Had backlight and sound but screen was light blue. Vizio had a recall on the set with certain Serial numbers and they extended the warranty to two years. The set I had was not in that range of numbers but the gave the customer a new 70" set

[triplefour]

Re: Vizio E701i-A3 no Picture

they gave them a whole new 70" tv?? how did they do that? the shipping must be insane

[Ltank]

Re: Vizio E701i-A3 no Picture

Vizio shipped him the new one and he was told to return the old set to where he bought it if feasible.

[triplefour]

Re: Vizio E701i-A3 no Picture

thats crazy. awesome. but still crazy. my friend bought this tv used on craigslist. if it turns out to be a bad panel is there any chance vizio will send him a new tv? we live in hawaii by the way!

[schwabee]

Re: Vizio E701i-A3 no Picture

I also have a Vizio E701i-a3 that had the picture go out on it. Called Vizio and they gave me the same line that there was nothing they can do and that I should shell out more money on a new Vizio TV. The sound and backlight are still working so I attempted the repair and bought a replacement T-Con board gambling that was the probelm. Just installed the new one today and the picture was working! Unfortunately that lasted for only a few minutes before the picture faded out again and back to where I started. Any idea what would be frying the T-Con boards?

[GoneGault]

Re: Vizio E701i-A3 no Picture

Schwabee, I wonder the same thing. Did you find any sort of service manual for the TV?

[ecking767]

Re: Vizio E701i-A3 no Picture

I also have a Vizio E701i-a3 that had the picture go out on it. Called Vizio and they gave me the same line that there was nothing they can do and that I should shell out more money on a new Vizio TV. The sound and backlight are still working so I attempted the repair and bought a replacement T-Con board gambling that was the probelm. Just installed the new one today and the picture was working! Unfortunately that lasted for only a few minutes before the picture faded out again and back to where I started. Any idea what would be frying the T-Con boards?

Post a picture of the T-CON board ( close up). I'm believed this T-CON board is having the same problem as the Vizio E601i-A3.

Shopjimmy does have a repair kit for the T-CON board

[sleepingAwake]

Re: Vizio E701i-A3 no Picture

Hello everyone.
So I picked up an e701i-a3 with sound but no pic. Got a replacement T-Con and it work for a couple of mins before going right back to blank screen no sound. Now I'm wondering if it's a bad panel blowing the T-Con or I got another T-Con in the defective range.
Pretty sure the eBay seller of the T-Con is just selling NOS boards that may have been made with the defective components. This was a ZH T-Con. Should I forget it and chalk it up to a bad panel?

[schwabee]

Re: Vizio E701i-A3 no Picture

Post a picture of the T-CON board ( close up). I'm believed this T-CON board is having the same problem as the Vizio E601i-A3.

Shopjimmy does have a repair kit for the T-CON board

Here is the original T-Con board that I pulled out. I haven't had a chance to open the TV back up and remove the replacement board.

I checked last night and they were out of repair kits. Additionally, it doesn't seem like the issue is with the T-Con board but rather something that is killing these boards since it worked for a few minutes.

Were you able to find a solution for the E601i-a3's?

[freakaftr8]

Re: Vizio E701i-A3 no Picture

Well I have been following this thread closely I also obtained this model TV. The symptoms are sound back light no picture. I found no 3.3 volt or 1.0 volt on the tcon board. It tries to come up upon start up but then dies off quickly. This is with or without the panel ribbon cables connected to the tcon board. So I found a supplier on eBay that says that he has a brand new t-con board never used and I purchased it put it in today without connecting the panel and I had no 1.0 or 3.3v still. And of course it does not provide an image. So my philosophy is a bad batch of t-con boards and I'm understanding the EEPROM on the t-con board is the culprit. I'm suspecting that this board probably had an issue and was removed from someone thinking it was a bad panel. There seems to be an awfully lot of these boards failing with this model TV. Of course the screen is made by sharp. I have had nothing but good luck with Sharp LCD panels so I highly doubt the panel is suspest.

****

[freakaftr8]

Re: Vizio E701i-A3 no Picture

Hey bjorkson did you ever get that tv straightened out?

[bjorkson]

Re: Vizio E701i-A3 no Picture

No, I think mine was due to a defective panel, since all my voltage was fine on my Tcon board. This model TV has a known issue with the Tcon/panel issue. You might try to get the correct Tcon and see if it works for you.

[freakaftr8]

Re: Vizio E701i-A3 no Picture

I picked up the tcon with the proper ZH abbreviation on the end. the supplier swears up and down that the tcon board was brand new never used directly from vizio or sharp. Like I said right out of the box it had no low voltages to the core CPU