Hello.
I have a problem with two games, i.e. Double Dragon II and P.O.W. - both are bootlegs and I have no sound in both.
I checked both boards and the amp with a logic probe and everything looks ok. On the 5th pin of the amp, the probe has a floating signal (you can then hear a quiet sound from the logic probe buzzer that corresponds to what is happening on the screen), so I guess the amp is working.
Where to look for the cause and how to fix it?
Below is a photo of the amp with P.O.W.
I have a problem with two games, i.e. Double Dragon II and P.O.W. - both are bootlegs and I have no sound in both.
I checked both boards and the amp with a logic probe and everything looks ok. On the 5th pin of the amp, the probe has a floating signal (you can then hear a quiet sound from the logic probe buzzer that corresponds to what is happening on the screen), so I guess the amp is working.
Where to look for the cause and how to fix it?
Below is a photo of the amp with P.O.W.
