Strange defect on LG 42PC55

[gabiz_ro]

Already checked all voltage and all OK
Replaced ~20 cap's on mainboard.Rest of them seems OK on ESR-meter.
Checked all cables etc.
If TV is powered standing on vertical position effect is in clip.
Image shifted 5 cm to right and under is another with some text looking like a boot or start message.
I can see some part of words.
boot

.....

Copyright

PXE

Licence



Client

https://youtu.be/aHtj-kUg4b0

But if TV is standing on table,face down and is powered works fine,can be flipped on vertical position,still work,and works fine until power off.

Any try to diagnose,knocking or flexing board don't change anything if image OK remain OK,if image flicker then continue to flicker.

Any advice?
Anyone encountered such case?

[dick_barton]

Re: Strange defect on LG 42PC55

Can you post some pictures of your circuit boards. It could be that you have bad connections or bad solder joints on one or more of your boards.

[gabiz_ro]

Re: Strange defect on LG 42PC55

Already checked all boards,resoldered major components,checked all sockets and cables and flexes.
On PSU checked all caps by ESR-meter.
On logic board found many bad cap's replaced like I said ~20 of them.

Strange is that image "under" real image.
Is like PC show on display real desktop alternating with BIOS POST messages.

[maxvalutech]

Re: Strange defect on LG 42PC55

Definite computer terms and would seem to be connected with a networking arrangement probably as a monitor. There must be a file retained by tv either an add on piece or component or instruction amendment to Eeprom but more likely the former. What moves in the set rear when you flip it and are all inputs unhooked and clear when starting up. Words client and pxe relate to master/slave arrangement.

[maxvalutech]

Re: Strange defect on LG 42PC55

Further to above the service manual for this set is readily available and on p7 adjustments it is evident that pc terms are used. Seems likely that service menu may have been corrupted. See if you can do a factory reset. Why ok flat and not vertical I don't know but one thing that does move is plasma which should not be transported or lay flat for extended time.