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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

12-18-2017, 01:20 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Just FYI I was able to revive this (47LV3700) and another LG 47LV5500 (after trying every possible part swap between them) by baking the motherboards (OG trick from bad solder joints on Nvidia cards )

Now if only the smart portion of these TV's actually continued functioning:

Out of these only [Vudu, Cinema Now, MLB, Netflix, Napster] are left. Playing to Youtube app off my phone is no longer an option since June 2017
Now I get it that older tech from 2012 losing...

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-29-2015, 04:33 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Bump. Anyone got any suggestions to check anything else?

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-27-2015, 09:24 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Here is the current behavior with the old T-Con (new on is similar):
[url]https://www.youtube.com/watch?v=ltItM_wiMFw[/url]

Any suggestions on what else to check? Where to go from here?Re: LG 47LV3700 No Picture, Sound Ok... go from here?Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-27-2015, 01:15 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

I measured all the voltages with the T-con disconnected from the LCD (2 ribbon cables)...

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-27-2015, 12:22 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Old T-con Reading in Black NEW T-Con in Red
VDD 16.32 [COLOR="Red"]16.63[/COLOR]
VCC 3.27 [COLOR="red"]3.29[/COLOR]
VIN 11.94 [COLOR="red"]11.98[/COLOR]
HVDD 7.85 [COLOR="red"]8.25[/COLOR]
VCORE 1.79 [COLOR="red"]1.79[/COLOR]

VGL -4.96 [COLOR="red"]-5.00[/COLOR]
VGH 26.7 [COLOR="red"]27.7[/COLOR]

VCOM 6.99 [COLOR="Red"]7.34[/COLOR]
VCMORFB 6.98 [COLOR="red"]7.33[/COLOR]...

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-27-2015, 10:06 AM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Ok the new T-con board didn't fix it.
Here are the voltages off the test points:
VDD 16.32
VCC 3.27
VIN 11.94
HVDD 7.85
VCORE 1.79

VGL -4.96
VGH 26.7

VCOM 6.99
VCMORFB 6.98
GID_RST -4.94
VGL_1 -4.96
VGH_ODD -4.96
VGH_R 26.7
GCLK5 -4.8 (DROPPING TO 0)
GCLK3 -4.96
GCLK1 -4.96

VST 26.7
VGH_EVEN 26.7 (DROPPING TO -4.9 THEN BACK)
VGH_F -4.96
GCLK6 -4.8 (DROPPING TO...

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-21-2015, 12:39 AM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Thank you for the reply's.

At the time the TV was open (had to hand it back on the wall for storage). I measured those and got voltages on those. Though I didn't write those down

My lines are running horizontally

I shotgunned this one:
[url]http://www.aliexpress.com/store/product/6870C-0368A-VER-V0-6-MODEL-V6-32-42-47-FHD-TM120HZ-TFTRA-T-CON-FOR/403088_618118946.html[/url]

It has an extra connector &...

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yegoshin replied to LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-20-2015, 09:47 PM
Re: LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Bump? anyone? Bueller?

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yegoshin started a topic LG 47LV3700 No Picture, Sound Ok, Backlight Ok

in Troubleshooting TVs and Video Sources

10-18-2015, 08:45 PM
LG 47LV3700 No Picture, Sound Ok, Backlight Ok

Hey guys I need a little bit of help.

I got an LG 47LV3700, the picture went out the other day. It was playing netflix the sound continued the backlight was on. Turning it [TV] off for a while seemed to solve it the problem temporarily (worked for a 2-10mins afterwards), then it happened again a few times and now its just blank.

There are a few thin lines up at the top of the screen and they seem to change with the signal.
Sound Good
Backlight Good
Picture - Mostly blank, sometimes thin lines up top. (Once it lit up grey in the middle of the screen...

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yegoshin replied to New Members - please post your introductions here

in Announcements & Related News

10-18-2015, 07:54 PM
Re: New Members - please post your introductions here

Hello my name is Dmitriy, from California. Need help with an LG 47LV3700 looks like a bad tcon board but need some more help

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