Chosen Solution
The amp was 110v so i plugged it to 220v. I changed the fuse but it didn’t work. I noticed something strange about the power supply heatsink. What are the next steps to find the cause of the problem?
Whoa…lemme get this straight, you know your amp is 110v and you plugged it into a 220v on purpose? Now you’re surprised it doesn’t turn on? That little black thing attached to the heatsink is a power transistor (To 220 I believe) and it has obviously seen a massive overvoltage and is fried…I’d start with that, but don’t be surprised if there’s more that needs to be replaced. That heatsink is strictly for the power transistor as they get very hot. Good luck, you may need it…
