LG 37LF65 no video signal on Av1,2,3

[hispeck]

Hello All, , LG 37lf 65 -zc no video signal on av 1,2and 3, only component is working, i need help

[nomoresonys]

Re: LG 37LF65 no video signal on Av1,2,3

Does it display a no signal message or just nothing at all on screen?

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

Does it display a no signal message or just nothing at all on screen?

yes, it display no signal

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

The component input gives picture, but you know if you dont connect the RGB on component there will be no color, so component works fine

[diif]

Re: LG 37LF65 no video signal on Av1,2,3

There is an IC in between the HDMI ports and main processor, I'd check that first and the circuitry around it.

[nomoresonys]

Re: LG 37LF65 no video signal on Av1,2,3

Did you try your device on a different tv?

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

Did you try your device on a different tv?

very well i did and is working fine, like i said, i connected the same device on component and it work fine, but no color because the device does not have component

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

very well i did and is working fine, like i said, i connected the same device on component and it work fine, but no color because the device does not have component

Here is the main board, please which of the IC you are talking about?

[diif]

Re: LG 37LF65 no video signal on Av1,2,3

The one above the HDMI ports. You can see the traces going to it.

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

The one above the HDMI ports. You can see the traces going to it.

Sorry please i mean the AV 1,2and 3 is not working, does this ic have any link with AV? like i said am sorry we are learning here, is very good for me to learn what i dont know

[diif]

Re: LG 37LF65 no video signal on Av1,2,3

What is AV 1, 2 and 3 ? Look at the ICs, identify them through data sheets then you will know their roles.

[diif]

Re: LG 37LF65 no video signal on Av1,2,3

It possibly could also be the capacitors https://www.ebay.co.uk/itm/LG-37LF66...item4d445fce55

[nomoresonys]

Re: LG 37LF65 no video signal on Av1,2,3

Looks like it's shared, are you plugging the yellow rca plug into the green and the red and white on the right side, not the middle red?

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

Looks like it's shared, are you plugging the yellow rca plug into the green and the red and white on the right side, not the middle red?

The IC that has connection to the AV is IC 1400 CXA2069Q

[nomoresonys]

Re: LG 37LF65 no video signal on Av1,2,3

Could try heating the chip with a heatgun, too much heat can kill it tho, if it starts working you know that chip is the problem.

[hispeck]

Re: LG 37LF65 no video signal on Av1,2,3

Hello friends, finally the fault is from the IC CXA2069Q, because i could not find the ic to replace, i just purchased a AV to VGA converter, did every connection inside the tv, most inportantly, i did not use the adopter that came with it, we all know is china and for duration sake, i did not use the 5v adopter that came with it, i took 5v to feed the converter so it will not be paminently on, i still used the AV3 as input to feed video and sound to tv. And everything work fine through ROB input. Thanks all