E701i-E3 70" LED Horizontal Line

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

That is the look you get when both tabs on both sides of the panel had failed. Hopefully fussing with the right side did not short the left side even though you removed the right side hopefully it's not too late. Will see what you get when you get another T con..

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

The TCON should be in Thu... I'll update the thread once I have news..

Thanx again for all the help, everyone...

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Well, the part came in late yesterday.. Didn't have time to do more than to throw it on and power up the TV..

All I got was a backlight.. Nothing on the display..

Is there a way to use a voltmeter to check the TCON to make sure I didn't get a TCON that was already blown??

[nomoresonys]

Re: E701i-E3 70" LED Horizontal Line

https://www.youtube.com/watch?v=yTnkOfwBGGE

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Thanx, NoMore...

Yea, it looks like this TCON board has a blown component.. No voltages on any of the points..

Is there a way to test the viability of the component itself off of the TCON board?? As I mentioned, I have several of these boards. If I can confirm a quality component then that might help me fix a TCON...

[nomoresonys]

Re: E701i-E3 70" LED Horizontal Line

I think in that video it shows think its a voltage regulator hes testing, says a bad panel takes that one regulator out quite often.

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

No need to check this transistor off the tcon board if it is bad it will read that either way on or off the board. Transistor operates the supply voltage to the PWM. Without it, there is no dividing of the voltages for the panel to. Function.

This is what you need.


QF which is a RTR020N05 2a 45v n channel SOT-23 style mosfet and it goes here. See pic attached

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Yea.. Last time I had this almost exact problem with this exact model, it turned out to be LVDS cables..

I might try to replace these, just fer sheets and greens..

But i am getting a bad feeling about this...

[freakaftr8]

Re: E701i-E3 70" LED Horizontal Line

Yeah I have a bad feeling too you might have screwed the pooch on fussing with the cables instead of just removing them as it could have shorted the left drivers as well unfortunately. The pics you provided earlier shows what a panel looks like when both driver ribbons have failed on both sides. There is no horizontal driving of the vertical sourcing so the panel doesn't know what to deal with the information that is being addressed vertically

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Yea..

I should have a new set of LVDS cables this weekend. Crossing my fingers...

Thanx again to all for the assist...

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

Final dispo on this...

No joy in Muddville today...

New TCON, new LVDS cables, still the same old glitchy look...

Thanx to all for the help... But my stoopidity wins the day.. :^/

[budwich]

Re: E701i-E3 70" LED Horizontal Line

you did recheck the bottom corner cables... the one on the "right" which should have been removed because you pulled the edge boards on that side.... and the one other the other side which you may have played with but not reseated properly.

[Michale32086]

Re: E701i-E3 70" LED Horizontal Line

you did recheck the bottom corner cables... the one on the "right" which should have been removed because you pulled the edge boards on that side.... and the one other the other side which you may have played with but not reseated properly.

Yep, I checked it.. Unclipped it, then jiggled it to reseat it, then re-clipped the tab...