Display tearing horizontally every few seconds.

Thanks for the reply. I used to be a TV repairman (1968-69), but we carried tube caddies back then😜. I owned a computer store for several years and did lots of repair on laptops, so I’m pretty sure the panel and backlight are fine. I suspect a sync problem and thought the T-conn board might be the answer but I’m not familiar enough with all its functions to be sure. I also can’t find a schematic showing the voltages.

If I can find the repair kit, which has all three boards, I’ll just buy that but everyone seems to be out of stock at the moment.

I did try another HDMI cable but it didn’t help. I buy good cables so I didn’t think that was the culprit. I also tried bleeding the power supply with the power cable off and holding the power switch on. That used to work on my old Sony WEGA(?).

The model number is D43-F1.

Thanks for the feedback.

@btidmore you were in it during its heyday. A real TV repair person. You know what, that is awesome. I miss the days where every city large or small actually had a tv radio repair shop. So much knowledge that we lost based on changes in technology. Now, nobody wants to fix any of this and we get told to buy new stuff.

Anyhow, you said three boards. So you have a separate T-con board. If you have the voltages on your T-con board, I’d get the main board first. Yes, if you can get all of them, even better. Schematics for Vizio’s are not available.

Yeah, back in those days color TV was fairly new, most people still had the black and whites. We made house calls to fix their electronics. We charged $5.00 for a B&W call, $7.50 for color. Ancient history now, the switch from analog to digital is complete. I went from TV repairman to being a field engineer for a large computer company so I made the switch also.

I’m still trying to source the parts but eventually I will find some in stock, probably on EBAY. In the old days we had SAM’s manuals for every model but nowadays only the manufacturer has tecnical manuals because they’re not really meant to be fixed, especially by the DIY guys, like us. Anyway, the PCB’S are hard to troubleshoot and the components aren’t meant to be replaced. You just swap boards, which is actually a lot easier than the old days, with discrete components and vacuum tubes requiring a lot more electronic knowledge and troubleshooting ability to repair.

You can’t stop progress but it’s fun to remember the old days.