I totally agree but I don't have an oscilloscope. With a multimeter can I see something? Thanks you.
Just unplugged the headphone cable from the board but nothing.....

I have 2 questions,
a) How to test an ic (pic1)?
b) These capacitors (pics 2,3) as seen, are ok? (with multimeter shows that have resistor, except one that when i connect with to multimeter shows negative polarity resistance!?
c) Last photo is manual what to check.
Any ideas appreciated!...

Hi, i want to try this but for now i haven' t 1⁄4 in audio jack to test..​...

Hi, thanks for advice, i just unplug the 2 square socketed IC’s, reseat them but nothing.. Power rails seems ok....

Thanks you mon2. I will check it, right now...

Hi all, this is my first post on this forum, i will need the help of someone who knows in order to repair the old Electric Keyboard Piano that was given to me.
It is a gold star brand, model gek s350. It lights up normally, everything seems to work but it has no sound. Neither from the keys nor from the ready melodies.
-I haven't forgotten a plug in the headphones.
-The capacitor that I touch with my finger (in the picture) has no resistance, as I measured with the multimeter, but I don't know if that's the reason.
Before i attempt something on my own and possibly destroy...