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Ok so I had the exact same problem as triplefour and midnight . Voltages were the same too . Figured it was the main board as the problem . When I removed all of the cables and unscrewed the board from mount I noticed the pads on the bottom side were really stuck to the metal frame . Upon further inspection I noticed the pads on bottom side had somewhat liquidfied. So I totally removed the pads from the board and used a microfiber cloth to get the sticky residue off the board . There were two pads and both had the same problem . I then proceeded to use my heat gun to dry the board . About three...
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Re: LG 60LB7100-UT backlights turn on then go out .
Ok so running tv with no picture for almost an hour then turning it off then back on I get a picture back . Here are voltages that are different when it works .
Sin / no picture 3.189v - with a pic .128v
P-Dim2 / no picture 1.735v -with a pic 3.53v
On the led output connector :
Led+'s \ when not working 55.5v when has a pic 72v
VC 1 thru 6 / when not working voltages range from 9v to 11.9 - when has a pic they range from 9v to 18v
So with the changes in the Sin and P-dim2...
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Re: LG 60LB7100-UT backlights turn on then go out .
Ok tv went back out yesterday . Here are those voltages .
SCLK / .086
Vsync / .011
Sin / 3.19
P-Dim1 / 2.44
P-Dim2 / 1.735
Dry on / 3.128
Pwr on / 3.14
24v , 12v , 3.5v working
Voltages to backlights connector
Led + \ 55.5v
VC1 / 9.96v
Led + \ 55.5
VC2 / 9.05
Led + \ 55.5
VC3 / 11.9
Led + \ 55.5
VC4 / 8.82
Led + \ 55.5
VC5 / 9.3
Led + \ 55.5
VC6 / 9.3
Any...
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Re: Vizio E601I-A3 dim picture and backlights flashing .
Update :
I got the tv as a dead set with no power at all . Replaced digital main and the tv worked for a few days . I could see a picture but it was dark and the backlights were flashing . It ended up being the backlights . Tv works great now !
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Vizio E601I-A3 dim picture and backlights flashing .
I was given this set as it was hit by lightning . Found out the Digital main was bad and replaced it . MY original main was a 0170CAR02100 and replaced it with a 0170CAR03100 . Sites said it was interchangeable . The tv worked fine for 2 days then developed a dark picture and can see the backlights flashing . Audio is fine . Wondering if the main board is causing this or my backlights are going bad . Here is a list of the voltages and resistance i've came up with . Any idea's on where to start ?
CN201
1 - 3.37
2 - 3.42 DET
3 - 3.34 PS ON
4 - 12.25 AU...
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LG 60LB7100-UT backlights turn on then go out .
When the set turns on I see the LG logo . Then it goes dark . Flashlight shows no video on the the screen . I also get no command from the remote . Only way to turn off is to unplug it . There is a flashing LEd light on the power board LD701. It blinks 4 times and pauses and 4 more blinks . It will eventually stop and turn off the tv after 5min . 3.5v & 12v & 24v are present . I can't find a service manual on this set . Has anyone seen this problem on this set before ? I have checked the LED's and all of them light up ....
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LG 60LB7100UT
My backlights turn on then go out . I have inspected the LEDs and all are lighting up . My question is can I activate them on ? The board # is EAX65550201(1.4)3 Photos
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LG 47LG50UA No picture or sound
First timer on a post .
The TV powers up with the red light flashing then going to blue light . I get no flashing of backlights and no sound from any inputs .
If I disconnect the flat cable from the inverter to the Tcon the backlights do turn on . I replaced the Tcon thinking that was the problem but it did not take care of it .
My voltages to the inverter are :
BRI = 3.36
On/off = 3.32
PWM-DIM = .014
Error =3.27
And 24v
My concern is the pwm-dim not coming from the main . Since I am not getting that should I assume it is my problem...
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Re: Looking for PS schematic LG 6709900019A
Where is this optocoupler bridge post at ? I would like to try it on the one i ma working on now ....Last edited by cooper trace; 08-07-2014, 04:16 PM.
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Yamaha Projector DPX-1300
Has anyone seen a replacement color wheel for this projector . And where i might be able to purchase one from ? Thanks in advance .
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Re: New Members - please post your introductions here
Hello everybody my name is James . I've been into electronic's since the 70's & have my own business . TV's are my specialty .
Board level repair i find the most fun , as swapping boards anyone can do .
I hope to give info that can help people fix there TV's as well as receive info on some others .
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