Re: e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
interesting ..that would be my luck, right after i take the drivers off, then i get an led issue .......
cueballsi
Member
Last Activity: 12-06-2020, 04:00 PM
Joined: 07-30-2020
Location: California
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Re: e701i-a3 no picture but backlights
Here is my post form before... you may not have a bad tcon board... it may be something else ... in the youtube vides it will tell you wat to measure to verify if the tcon is bad... also in the other video to see what side is bad too if it is the drivers
OKAY got the TV going to dig into it tomorrow and test some resistances on the TCON board.
SYMPTOMS- has back light, no image, 2 or 3 bright white spots at the bottom
I found these videos:
How to test Mosfet:
[url]https://youtu.be/yTnkOfwBGGE[/url]...Leave a comment:
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Re: e701i-a3 no picture but backlights
YUP, that is what I used to diagnose which side... great info ......Leave a comment:
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Re: e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
do you know what would trigger the leds dimming and darkening?...Leave a comment:
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Re: e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
bump.. anyone can help???
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Re: e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
yeah I followed all the diagnoses ... repaired the mosfet on the TCON board. and removed the drivers on the "bad side"...
the LEDs were pretty solid for the first 2-3 mins and then they started to pulse... wasn't sure if I damaged something by using the wrong power cord ... something on the LED driver board, or the power board?Leave a comment:
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Re: e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
This. It had bad drivers on the LCD...
[url]https://www.badcaps.net/forum/showthread.php?t=49281[/url]Re: e701i-a3 LEDs pulse after removi...?t=49281[/url]...Leave a comment:
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e701i-a3 LEDs pulse after removing drivers, and also using wrong power cord
Well need some help guys... I removed the drivers and put it all together have some lines.. I think I need to clean the cables and put them back. BUT I noticed the following:
- I used a OO power cable instead of the [ ]O looking power cable to power up the tv.
- The LEDs seem to brighten and darken and brighten like a very slow strobe.
Did I mess up the board with the power cable mess up? I switched to the [ ]O type and still slowly pulses....
what would make the LEDs do this?
any help would be appreciated. What should I test?... -
Re: e701i-a3 no picture but backlights
glad it all worked out... NOW... who can answer my questions
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Re: e701i-a3 no picture but backlights
here is a tip. in a dark room, boot up the TV. If you see the screen V flash, then that means it is an LED issue. IF an LED shorts out on a strip, it will take out the whole strip (like xmas lights). IF you want to tackle this job, be very carful when removing the Lcd... If that cracks, Bye Felica!
Once you get the LCD screen and diffusers off... turn on your phone camera to high speed and boot up the tv.... you will see the LEDs light up on boot up ... and the surge of power will arch through the bad LEDs. your high speed video...Last edited by cueballsi; 09-29-2020, 11:18 AM.Leave a comment:
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Re: e701i-a3 no picture but backlights
Well need some help guys... i removed the drivers and put it all together have some lines.. I think I need to clean the cables and put them back. BUT I noticed the following:
- I used a OO power cable instead of the [ ]O looking power cable to power up the tv.
- The LEDs seem to brighten and darken and brighten like a very slow strobe.
Did I mess up the board with the power cable? I switched to the [ ]O type and still slowly pulses....
what would make the LEDs do this?
any help would...Last edited by cueballsi; 09-29-2020, 11:17 AM.Leave a comment:
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Re: e701i-a3 no picture but backlights
OKAY got the TV going to dig into it tomorrow and test some resistances on the TCON board.
SYMPTOMS- has back light, no image, 2 or 3 bright white spots at the bottom
I found these videos:
How to test Mosfet:
[url]https://youtu.be/yTnkOfwBGGE[/url]
How to tell you how to determine which side of the panel is bad:
[url]https://www.youtube.com/watch?v=cyCKoMi_5IA[/url]
How to remove the Ribbon:
[url]https://www.youtube.com/watch?v=sJ0EzOuckyU[...Leave a comment:
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Re: e701i-a3 no picture but backlights
I am suppose to be getting a free E701i-A3 on monday. we will see... I read a majority of the posts, and the you tube video helped quite a bit. Once i pick it up I will order the transistors (RTR020N05TL)... 5 pcs from digikey for $9.10.
the owner sad they were watching it and one day while watching it went blank... and he believes it still had sound...
I just re did some LEDs on a E60-C3, so this one will be interesting... will be back once I have it and get pics
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