Full 'make model (what it is)' in all questions please, first 3 words.
Capacitors can split or bulge, resistors can burn,, the transformer can fail internally..
Take it for repair unless you have the thousands of dollars of test equipment and have do the 2 year electronic course.
Instead of aux (Blue Connector of PC Sound), try using head phone jack (Green Connector of PC Sound). It if is working fine, uninstall sound driver of your PC, restart PC and install sound driver again. Your problem will be fixed.
Wrong washing deterjant being used and machine not leval . Google your machine with the error code and you find a u tube link on this that will help you
This is a 'front end loader'.
https://www.google.com/search?q=front+end+loader
Google
LG (model number) light flashing
No idea what you mean by
drying light flashing in the cooling light to stainless
and I have been reading the question since yesterday!
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Sad to say, there are many more displays where LED's fail. Lights have limited lifetime. Even when they are not so bright.
The red, yellow or green characters consist of small LED chips on tiny wires inside a number of colored tubes. LED has individual cells mostly connected in series. Therefor one LED element can go out completely, even when it consists of more then one LED. You can repair by interchanging the display unit as a whole but only on the occasion when the display could be removed, the cable has a connector and when made readily available as part.
It is wise to disconnect a device with such a display from the power when not in use. As I understand this display is comprehensive so you better rest your case and do as advised.
Possibly a stuck or closed defrost sensor. The sensor gets to freezing which closes the switch. So the unit goes into defrost cycle which switches the flow of the freon on a Heatpump. The hot gas thaws the coil and the sensor. Which opens the switch and switches it back. I'm giving this answer without knowing more about the unit. Defrost light comes on & it doesn't run at all? LG system is a split unit or window unit or what? If you need further help, reach me via phone at https://www.6ya.com/expert/thomas_868a5ee3bf9eea64
Question edited for clarity and translated to English.
A CH 24 error code indicates a pressure switch error. To Resolve: Make sure the air filter in the unit is clean. Remove any items or reposition the unit so that the air flow is not obstructed.
Apr 25, 2023
110 volt home mains supply? 17.9 volts over is pushing it a bit if you get any voltage surges on top of that. Integrated Circuits have a relatively low tolerance.
I would change machine brands.