LG37LF66 - video but no sound - not t-con not power supply

[newtothis]

Re: LG37LF66 - video but no sound - not t-con not power supply

Well after heating the PSU and encountering the issue it certainly points at the PSU failing.... Can you take the reading in order from the psu to the mainboard and note each one down whilst fine/flickering and off and post results here.

E.g

FINE:

Pin 1 - 0VDC
Pin 2 - 5VDC
Pin 3 - 12VDC

Flickering:

Pin 1 0VDC

You get the idea.

[zelig880]

Re: LG37LF66 - video but no sound - not t-con not power supply

well I have done my check.. and I think it will be quite unsuccessful...
Unluckily the flichering is not long enought for me to get the reading.. but they seems the some also when it was flickering..

I will use the hair dryer again to focus on the mainboard. I think it is the issue.. i watched tv with the board sligly lifted ( to increase hair flow and I managed to watch tv for over 2 hours.. ). Just a few extra points, the screen resolution changes every 5-6 minutes.. its just slightly.. but it streaches.. and then stretches back after few minutes...

for example on e4.. i can see the singer name and the title of the song, that i change and the song name is out of the screen.. then change again.. and so forth... there is no real patter..

Another point is that if I watch HD channel the problem comes earlier ( but i assume is because it makes more effort to show the program..)


This are the reading..

PERFECT VIDEO:

starting from the top connector with 13 pins:

PIN1 5.10
PIN2 2.8
PIN3 5.03
PIN4 -
PIN5 4.38
PIN6 3.10
PIN7 1.66
PIN8 5
PIN9 -
PIN10 -
PIN11 2.4
PIN12 6.20
PIN13 0.86

second connector strating from the top:

PIN1 18.7
PIN2 18.7
PIN3 -
PIN4 -
PIN5 6.2
PIN6 -
PIN7 3.4
PIN8 -
PIN9 12.2
PIN10 -


WHEN THE SCREEN WAS OFF:

PIN1 5.10
PIN2 2.8
PIN3 5.03
PIN4 -
PIN5 4.38
PIN6 3.10
PIN7 1.65
PIN8 5
PIN9 -
PIN10 -
PIN11 2.4
PIN12 6.20
PIN13 0.86

PIN1 18.7
PIN2 18.7
PIN3 -
PIN4 -
PIN5 6.2
PIN6 -
PIN7 3.4
PIN8 -
PIN9 12.2
PIN10 -