lg 50pg4000 loses sound remote stops working and switches off

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

Well as the fault is caused by it running for a long time, and hence heat likely, then a hairdryer will probably make the problem worse. If you can't do a factory reset then there is no option but a board swap.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

cant even try factory reset from service menu as cant get in just yet takes ages to get the remote working

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

tom got a hairdryer is it worth trying it

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

Which indicates it's receiving the instructions but discarding or ignoring them - the main board is at fault. On some of these main boards, there's a SUB MICOM for processing IR, standby and LED functions. The SUB MICOM connects to the main processor by I2C interface, typically. If there's a problem with the main processor or the interface, this effect might be observed.

As for repair? Main board swap is probably the only thing that can be done.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

The remote board wires go to a different section of the main board that the audio. If it goes out after warmed up, I would try freeze spray on the voltage regulators and audio chip. When the audio drops out what is the voltage to the chip? The preamp IC has a lower voltage than the audio amp. Check both while your there. Do you loose the power to the IR remote rcvr facing the front of the set? I am responding from my phone so I am unable to look at a schematic.

once I lose sound the remote works tv led flashes to show this but will not do the functions pressed

[Ltank]

Re: lg 50pg4000 loses sound remote stops working and switches off

A fast and easy test is to unplug the IR from the main board and use the buttons on the set for on/off and volume up/down. If the board is bad it can cause these problems

[Ltank]

Re: lg 50pg4000 loses sound remote stops working and switches off

The remote board wires go to a different section of the main board that the audio. If it goes out after warmed up, I would try freeze spray on the voltage regulators and audio chip. When the audio drops out what is the voltage to the chip? The preamp IC has a lower voltage than the audio amp. Check both while your there. Do you loose the power to the IR remote rcvr facing the front of the set? I am responding from my phone so I am unable to look at a schematic.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

cant get remote working now at all meaning none respondant

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

it does mate ill try that

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

That may or may not cause issues, but sounds like the board has been previously replaced.
One other thing to check is if the set has a separate board for the buttons try disconnecting that.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

im trying but cant get damn remote to work again


heres a thing its a 50pg4000 but it has the pg6000 main board in

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

You don't own a hairdryer?
LVDS, Y-sus, Z-sus, Y-buffer, panel etc wont have anything to do with sound.
Only possibility is PSU or Main, and you ruled out PSU.
Try service reset from service menu before you swap main.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

I only have a heatgun tom I could use low setting but where would I try heating up



so you think x and y are fine ldvs and all buffers are ok you think main board

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

I'd suggest heating up things as well to see if it's a main board fault. I think main board fault is extremely likely.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

ill have to wait as failure has occurred so remote or sound don't work

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

At all, or when failure occurs?

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

headphone not working nor is my 2.1 Logitech pc sound system

[tom66]

Re: lg 50pg4000 loses sound remote stops working and switches off

Menu on buttons, Menu on remote. Hold for 10 seconds. If password pops up, enter 0000 or 1234.

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

how to get service mode on this set mate

[wreksta]

Re: lg 50pg4000 loses sound remote stops working and switches off

lol cheers tom I feel daft now I thought you meant check volts or something I have headphones yes

but no soundbar or av receiver