Re: Led tv Polaroid MHDV3911-s7 Half an image

Just a quick update to all the techs that new what was going on here. Yesterday I had an hour to spare so I thought I would go and test voltages from main to bottom buffers, having found some AUo pdfs for the lvds outputs etc. I thought I would also take a closer look at the cof/ tabs as thats where I was directed to by most people. So on taking a closer look , I could see what appeared to be damage to the cof/tabs. Zooming in on my phone and then later with a hand scope I could see damaged & broken tracks?
If you look at...

Re: Led tv Polaroid MHDV3911-s7 Half an image

Many thanks, well I am stuck on where the t-con & power signal is generated from? If you look at my av board photo, you will see a big heatsink & I guess chip underneath, leading to the left,the ldvs cable to the bottom buffer boards. I am thinking I need to start testing here, I think it shows C111 to C 136 on the connector/pcb traces. Anyone like to guide me here?

Have seen Budm's guide on t-con boards so know I shoulds be having some different voltage reading etc. Will have to remove av/board to see if legend...

Re: Led tv Polaroid MHDV3911-s7 Half an image

Hi Andrew, now its been confirmed that its a bad panel, its just a case of how far I can try and trace any faults, like blown smd components/cof etc. on the bottom boards, as I know one side is receiving the signal it would be nice to be able to trace it to the faults. Now its more of how much this tv can teach me .
Having no schematic and voltage readings makes it so much harder, I suppose I will have to try and see if there is any difference in voltages /if the signal spits before the bottom buffer boards, as I am now guessing...

Re: Led tv Polaroid MHDV3911-s7 Half an image

Many thanks for that information Angelos, thats the sort of knowledge I need to know. I will have to examine these bottom buffer boards closely to see if there is anything visible blown & if there are the same test points on main/ av board, right bottom buffer & left bottom buffer.

I am probably wrong, but I am thinking signal and voltage for timing is getting to the right buffer but after that it all goes wrong, where the signals split & thats why I only have image to one side?

If anyone has...

Re: Led tv Polaroid MHDV3911-s7 Half an image

Thanks for the quick reply tvtimmy. Can anyone advise to further my knowledge if I am correct in thinking the following ;

(a) the image signal & power is generated on the av/main board for this tv

(b) that ldvs signals are going to the first bottom buffer board, but are not then being shared to the other bottom buffer board? Could be power signal to this buffer? hence lack of any image on one side.

Many thanks chris

This is my first post, although many of you have already helped,me fix a few plasma's with blown caps etc.by following other posts, but I thought
I'd try and fix this led tv, but I am in need of guidance.

Tv Model Polaroid MHDV2911-s7 39"LED TV

Inside back cover chassis label T390HVN01.0 /MA3394233100014

Power supply board TV4205-ZC02-01 / KB-5150 / M16/G42332/02

Main/Av board MSDV3223-ZC01-01

Bottom buffer boards VP3A25B02FZZ-281100 1309 T390HVN01.0 / T390HVN01.0 XL / FX-5539T01S02-32F-0000N0P-00509-07...

Re: New Members - please post your introductions here

Hi everyone, my names Kris and I live in London, and I have joined this forum looking for help to fix tv's etc. Due to sudden illness and being housebound for the last few years, I was looking for a new hobby that could fit around my illness and being housebound. So far advice on this forum given to others has helped me fix my first plasma, but I definitely need help with my latest plasma. So as soon as I can post details I hope members will help educate me in how to fix them properly. P.s. Don't tell anyone that I use to be...