Bitvive
Member
Last Activity: 02-10-2025, 11:33 AM
Joined: 10-31-2023
Location: Hamburg
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Resetting via the stop function did not help. I think there seems to be a fault on the power supply PCB? -
So first check the standby voltage to see if it is present everywhere? Unfortunately I can't find any schematics for this model. Up to from the PSU is still visible on the plug.
Ouh ouh, very bad.. Do you mean that it is more likely to be CPU or RAM? Then it must be bad solder or oxidation on the balls? Do you think a reball attempt would be successful?
Edit:
Whereby the TV runs for hours without any problems - until it is switched to standby. Are you really thinking of problems with the RAM or CPU? Then normal operation should not work until the standby state....Leave a comment:
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Hi Lotas,
Now my screen simply switches off after a few hours of operation and can then be switched on again normally. What are you thinking? Replace the large 420V buffer capacitor as well?...Leave a comment:
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Hi together,
now the update.. As I thought, the IN_STOP command didn't help at all. The IN_STOP command is sent -> the TV wants to restart -> and no longer switches on due to the standby problem.
The TV switches itself off or tries to restart, but does not manage to wake up the standby, as the lamp stays on for a maximum of 3 seconds.
I guess there are problems with the standby voltage on the PSU or the T-CON board? There must be a component responsible for this. Since apparently the voltage cannot be maintained. hmm, some kind of buffer capacitLeave a comment:
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All right, let's do it like this. We'll try the IN_Stop command and then we'll see. Do you have a simple, clear guide for the IN_Stop without Service Remote that works for this LG model?Leave a comment:
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I understand the process of first ruling something out with In_stop. However, are there any useful measurements I can make on the PSU board to rule out errors on it? My colleague won't be back for another 2 weeks....Leave a comment:
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Hi Diah,
I have now spent some time googling and have also read up here in the forum. Now I think I understand the In_Stop command. This simply resets the TV to the model-specific factory calibrations?
But I can't find anything about my error anywhere. As I said, the TV runs without any problems and goes into standby after being switched off manually. After 3 minutes the standby goes off and the TV is dead. If you disconnect the cable from the socket and then plug it back in, it works normally until you switch it to standby manually.
Maybe I have not understood...Leave a comment:
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I don't quite understand? So I hope I've explained correctly that the TV itself runs for hours at a time....Leave a comment:
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LG OLED77C19LA Standby Issues
Hi mates,
I've an issue with the standby function of the LG OLED77C19LA from a colleague.
[B]Device[/B]
Model: LG OLED77C19LA
[B]PSU[/B]
PCB: EAX68999802
LG P/N: EAY65689422
He described the problem to me as follows: The device can be switched on normally and does not cause any problems.
As soon as you switch it to standby, it stays on for about 3 minutes and then switches off. It can then no longer be switched on.
If you then disconnect the power using the plug or a power switch, the TV switches on normally.... -
You were right! The case was a real pain to get open, but I immediately noticed a 680 uF 25V electrolytic capacitor that was blown.
I replaced it and the monitor now runs with the repaired power supply unit without any coil beeping or errors. Great, thank you
...
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Thanks for the hint mate.. I should have thought of that myself. It actually only measures 15.42V under load. With the laboratory power supply set to 19V 1.7A,
the display works and does not emit any coil beeping. It can be that simple, new power supply is ordered...
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LG Flatron starts w. coil whine and power issues
Hi,
My old LG Flatron recently started with coil beeping. This got worse every day for a few days until it also started having power problems.
Now it also went off again after displaying the LG logo, then on, off again, then on and so on...
So far I have measured the power supply unit, which delivers 19.21V and should therefore be OK. I removed the circuit board and connected it to the mains plug so that I could hear the coil beeping.
During the beeping, I pressed on the coils with a non-conductive tool to see if the sound changed and to find...
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