Howdy,
I have gone through the forums and tried a bunch of things that others had posted. I am hoping some one can point me into the right direction.
Original symptoms.
press the power button you can hear the relay click.
The LG logo illuminates white for a moment then fades out.
Behind the back cover.
when Power button is pressed the red LED on the Main/Media board stays illuminated.
You can not turn the tv off with the power button. when using IR remote You hear the relay click OFF and the Red LED is no longer lit.
There is NO 5v Going to USB ports, NO SOUND NO PICTURE.
Main/Mediaboard
Powersupply
Tcon Side a
Tcon Side b
First test
Followed directions of LG Smps Testing. BOTH "1" and "2" parts of the testing were followed.
All voltages are present. 3.3v 12v 24v
Tested 24Volts with Bulb and it tested ok.
On the post by Diah he says to supply 12v from power board socket to T-con F1 fuse (I don't have F1 fuse but in the same spot there is "F71")
by doing his steps. plugin in mains Power on the TV a moment later it goes automatically into panel test colors.. This was Brilliant Bright perfect colors no display damage or Distortion on the panel.)
video of the Test Pattern on the panel.https://photos.app.goo.gl/JVpnKvjJFn2nKPvK9
I let this run for about 5- 10 min Feeling like there was a mild victory.
Second test
Unplugged mains, removed jumpers from 1st voltage and test pattern. plugged in the TV and powered on The set continued to behave with original symptoms.
unplugged mains, removed 2 center ribbon cables to the panel from the T-Con board ( can not find which post recommended this test.)
Plugged in and powered on. Relay clicks on Flash of white at top of panel (about 1 inch) USB gets ~5v for less than 1 second. Red LED on Main/media board. a short moment later Relay clicks off.
doing this a few times Locks the Main/Media board out.
I continued to reattach the Panel Ribbon cables to the T-Con board
Supply mains power. Power on TV. Relay clicks on. LG Logo illuminates white for a moment. Usb 5V < 1second Red Led on Main/Media board Relay clicks off. Mainboard LED off.
Third Test
Attempted IR service remote zip file supplied from Freakafter8
Both on a Android that has IR blaster. and even built a IR blaster with Headphone jack and used the media files on both a laptop and android device full power Pitch-black room.
"Power only" Never turns the TV on. THE IR blaster on the android is working with universal remote apps,
Found 2 different service remotes under "IRplus" and "Smart Remote" Applications. The TV will respond to power button but not "power_only" "in-start" or "in-stop"
I followed a post about holding down sw201 on the main board. press power button. wait for 3 relay clicks (4 if you include the first power on click)
Pressed power button on remote. Relay clicked off.
pressed power button on remote. Relay clicks on. Symptom 1 returns. ( no longer locked?) the red LED stays on until power button on IR is pressed and the relay clicks off.
Any Ideas on where to go now?
Thanks for everyone's support on Badcaps.net
This has been and extremely useful site for me!
Hopefully this is not too difficult to understand.
Rhino
I have gone through the forums and tried a bunch of things that others had posted. I am hoping some one can point me into the right direction.
Original symptoms.
press the power button you can hear the relay click.
The LG logo illuminates white for a moment then fades out.
Behind the back cover.
when Power button is pressed the red LED on the Main/Media board stays illuminated.
You can not turn the tv off with the power button. when using IR remote You hear the relay click OFF and the Red LED is no longer lit.
There is NO 5v Going to USB ports, NO SOUND NO PICTURE.
Main/Mediaboard
Powersupply
Tcon Side a
Tcon Side b
First test
Followed directions of LG Smps Testing. BOTH "1" and "2" parts of the testing were followed.
All voltages are present. 3.3v 12v 24v
Tested 24Volts with Bulb and it tested ok.
On the post by Diah he says to supply 12v from power board socket to T-con F1 fuse (I don't have F1 fuse but in the same spot there is "F71")
by doing his steps. plugin in mains Power on the TV a moment later it goes automatically into panel test colors.. This was Brilliant Bright perfect colors no display damage or Distortion on the panel.)
video of the Test Pattern on the panel.https://photos.app.goo.gl/JVpnKvjJFn2nKPvK9
I let this run for about 5- 10 min Feeling like there was a mild victory.
Second test
Unplugged mains, removed jumpers from 1st voltage and test pattern. plugged in the TV and powered on The set continued to behave with original symptoms.
unplugged mains, removed 2 center ribbon cables to the panel from the T-Con board ( can not find which post recommended this test.)
Plugged in and powered on. Relay clicks on Flash of white at top of panel (about 1 inch) USB gets ~5v for less than 1 second. Red LED on Main/media board. a short moment later Relay clicks off.
doing this a few times Locks the Main/Media board out.
I continued to reattach the Panel Ribbon cables to the T-Con board
Supply mains power. Power on TV. Relay clicks on. LG Logo illuminates white for a moment. Usb 5V < 1second Red Led on Main/Media board Relay clicks off. Mainboard LED off.
Third Test
Attempted IR service remote zip file supplied from Freakafter8
Both on a Android that has IR blaster. and even built a IR blaster with Headphone jack and used the media files on both a laptop and android device full power Pitch-black room.
"Power only" Never turns the TV on. THE IR blaster on the android is working with universal remote apps,
Found 2 different service remotes under "IRplus" and "Smart Remote" Applications. The TV will respond to power button but not "power_only" "in-start" or "in-stop"
I followed a post about holding down sw201 on the main board. press power button. wait for 3 relay clicks (4 if you include the first power on click)
Pressed power button on remote. Relay clicked off.
pressed power button on remote. Relay clicks on. Symptom 1 returns. ( no longer locked?) the red LED stays on until power button on IR is pressed and the relay clicks off.
Any Ideas on where to go now?
Thanks for everyone's support on Badcaps.net
This has been and extremely useful site for me!
Hopefully this is not too difficult to understand.
Rhino
