Vizio m701d-a3r disorted picture

[realdealthill]

looking on advice on how to fix , I have experinece with a multimeter and replacing lcd panels. I read freakaftr8 post on defective side tabs, could this be the same case?? and mine is a 3d tv his wasnt. Would that matter?

[alfredomfr1]

Re: Vizio m701d-a3r disorted picture

I have same problem with my m701d-a3r.
Do you find a solution?

[Andrew F. Ali]

Re: Vizio m701d-a3r disorted picture

I would check the backlight circuit and backlights first to rule them out as the defect.

[dick_barton]

Re: Vizio m701d-a3r disorted picture

I'm not 100% certain but it looks very much like a side tab issue which has been discussed widely on the forum. Do a forum search and see what you think.

[mmartell]

Re: Vizio m701d-a3r disorted picture

+1 for side tab issue

[freakaftr8]

Re: Vizio m701d-a3r disorted picture

Yes this is a side tab issue. Just repaired one the other day same exact symptoms as the e701 series. This has a different bezel surround so it's a little more intricate to pull apart. All done from the back side. The driver boards on the side are located behind the panel on a black plastic housing assembly. You need to remove the screws hold the driver boards in slipping away disconnect the frame and pull it back and carefully remove all tabs feeling way from the panel on the defective side. This side would be your right side which is the darker side of the picture

[augiedoggy]

Re: Vizio m701d-a3r disorted picture

Have any of you seen a panel do this? the backlighting strips are from the sides and Ive confirrmed they are ok... this appears to be a dark area in the panel.

[budwich]

Re: Vizio m701d-a3r disorted picture

look at the tabs at the bottom along with the board down there ... especially for water "ingression".

[augiedoggy]

Re: Vizio m701d-a3r disorted picture

look at the tabs at the bottom along with the board down there ... especially for water "ingression".

i already put it back together the owner is picking it up today... the panel is likely unrepairable right? I did inspect them and couldnt find any obvious damage or discoloration.

[budwich]

Re: Vizio m701d-a3r disorted picture

unrepairable probably... but saveable maybe. The other test is disconnect the small corner cables at the bottom interconnecting the side boards to the bottom.... closest to the side in question. The whole picture on that side may go "darker" or similar to what you are seeing in the area currently. Then you could potentially try the "save" by removing the whole bad side and see if things improve... as a last resort. It sounds like its headed for the recycle bind.

[freakaftr8]

Re: Vizio m701d-a3r disorted picture

I seen this on some sharp LCD panels. Has this one had the side tabs removed off of 1 side yet? I have especially seen it on a few repairs and I have done removing the side drivers that have shorted previously.

[augiedoggy]

Re: Vizio m701d-a3r disorted picture

thanks for the advice,
I did not remove any of the side tabs.. didnt see how those could cause a dark spot isolated in the center like that. The owner is going to use it the way it is.. if I remove the side tabs it will likely dramatically shorten the life as most of these repaired sets die in months from doubling the load to the remaining tabs=it seems.

[freakaftr8]

Re: Vizio m701d-a3r disorted picture

Most likely. Could be aging panel. Possibly the panel is requiring more VCOM voltage or something. Best to leave alone anyway. Could get worse. A couple years ago I saw a vizio E701- a3 like this at target on display and it looked horrible. The ones that I've seen a couple of a were like this after doing the side tab surgery.