Hi Guys,
I have sound problems, sound scratching between 3 to 5 minutes, that will be turned off.
the sound is unclear
What is it ?

www.brainchamber.com/panasonic-tv-blink-codes/

Thank you

in most cases is a poor filtering(ripple) in the power circuit

Check it

where exactly do I have to search?

right has more problems

I wanted to test loudspeaker plug, if loudspeaker plugs are defective therefore remove loudspeaker plugs from the mainboard.
unfortunately not yet tested with headphones
how to check a bad filtering (ripple) in the circuit

Ripple voltage can be saw in oscilloscope. In audio circuit power supply, a audible(if frequency is audible 0 a 18KHz) ripple.

Most of times isn't main power supply but a ripple in circuit.



If capacitor is good, brown trace, without it, green.
If defective noise between green and brown, this audible riple (most of times 50Hz from main 240V AC power source) is amplified by audio circuit.

hello, I have exactly the same problem with headphones

hello a question
which defective capacitor does one have to look for in power supply?
or should I buy power supply
Thank you very much

Please respect other users don't put severall post with same text.

In Europe Power Supply is cheap, is better buy a new one.
See part number or reference in board and search for it in pwb sellers online.

Hello everybody
I also replaced the power supply
Unfortunately, it did not help me