LG 42pq6000

[sordids999]

hi guys

picked this tv up today originally had a fault where only half the screen was working but fixed this after cleaning out loads of dust and reseating the lvds ribbons,but i have also noticed that the remote control does not work on this tv i have tried 3 remotes the only thing that works is the turn off button even the side buttons do not respond
also just for the record the tv takes roughly a minute to turn on not sure if thats normal for lg plasma ?

thanks

p.s the standby sensor is flashing on the front when trying to use the remote

[sordids999]

Re: LG 42pq6000

update :

im not getting a reading of C413
C411
C403
C405
C406 im getting readings could this be the problem ?

[tom66]

Re: LG 42pq6000

The standby light should not flash, I would check that a button is not jammed on the button panel. If possible, unplug it and just test with IR for now.

[sordids999]

Re: LG 42pq6000

already tried that tom if you disconnect the side buttons the tv will not turn on at all if you press buttons on remote the blue standby light flashes fine but nothing works on tv
p.s both power switches are the only thing that works on the remote and side button

[sordids999]

Re: LG 42pq6000

could it be the control board causing this problem because the right side of the screen problem has come back and if i press a button on the remote it goes ?

[tom66]

Re: LG 42pq6000

Sounds more like it could be main board related. Try disconnecting the LVDS cable between the main board and logic/control boards. Then put a little wire jumper across the "EXT AUTO GEN" points to engage the test patterns; what happens? Do the patterns appear OK? The TV will need to be turned on, but only plug it in when you have made all connection changes.

[sordids999]

Re: LG 42pq6000

yes test patterns are scrolling through look fine tom but on some light test patterns i can just about still see the half screen fault

[tom66]

Re: LG 42pq6000

Run it for some time to make sure that's not just image retention. It is possible you have two faults here, but that would be odd.

[sordids999]

Re: LG 42pq6000

ok ill run it for a while you think its main board and control board fault then ?

[tom66]

Re: LG 42pq6000

I think there might be two faults yes.

Might be expensive to fix. At least Y-sustain, Z-sustain, power board and Y-buffer are guaranteed ok, you should recover your investment there easily.

[sordids999]

Re: LG 42pq6000

ok thanks tom

[sordids999]

Re: LG 42pq6000

update :

im not getting a reading of C413
C411
C403
C405
C406 im getting readings could this be the problem ?

tom last question would that cap cause this fault ?
its strange ive just realised the volume works on the remote but it wont show it on screen that its going up

[tom66]

Re: LG 42pq6000

Doubt it, what are you using to read the caps?

Have you tried a full factory reset? (Hold MENU on the TV and MENU on the remote then select "Factory Reset"; if prompted for a password use 1234 or 0000 or 3142)

[sordids999]

Re: LG 42pq6000

esr meter unless that the wrong thing to use ?

no factory reset does not work tom

[tom66]

Re: LG 42pq6000

ESR meter can't be used on these small caps. I doubt they will cause the issue. I will look into how to get service menu access.

[tom66]

Re: LG 42pq6000

I'm guessing since the user menu does not appear you won't be able to access the service menu through the normal mode. However it might be possible to send it commands over RS232 to access these modes... do you have a PC with an RS232 port on it ? I'm trying to find a command reference.

[tom66]

Re: LG 42pq6000

Commands:

ToolOption1 = ab 00 00
ToolOption2 = ac 00 00
ToolOption3 = af 00 00
ToolOption4 = ag 00 00

You need some way to send those commands, then you can access service menu.

[sordids999]

Re: LG 42pq6000

I'm guessing since the user menu does not appear you won't be able to access the service menu through the normal mode. However it might be possible to send it commands over RS232 to access these modes... do you have a PC with an RS232 port on it ? I'm trying to find a command reference.

im thinking you mean the connection port on your pc to connect a tv ?

[tom66]

Re: LG 42pq6000

Port should be marked RS232 or IOIOI or Serial "Control/Service"

You can use a USB to RS232 cable or a PC with an RS232 port.

[sordids999]

Re: LG 42pq6000

no its not got a rs232 but thanks for your help tom anyway