dead amp

Hi everyone! This is my first repair post so please be gentle with me haha. So a few months back I picked up a pioneer sx-1250 reciever and a sg-9500 equalizer from a rather sketchy man. I was told I could test them and that they worked great.......we've all heard that story before haha. so I...

I have a dead JA-S22 JVC amp. No lights. No power. But what surprised me is so many of the underside of the boards bad solder joints. I will post a pic in a bit. But never seen such a large amount of bad joints. Has anyone else experienced this on JVC stuff?