Hi guys, recently I bought a second hand amplifier. Everything runs fine except indicator light is not on, so I'm planning to change it. Also I'm going to change power plug as the power cord cannot be changed. I have zero electronic experience but read several chapters of book for electronic dummies. I understand big capacitors in amplifier are dangerous as they store power. Just wondering if I need to discharge them for just replacing the power plug and indicator light? Or is there anything I need to know before my little experiment? I uploaded couple of pictures of amplifier for you guys to have a look, many thanks.