I own a not working NAD302 integrated amp. Normally when power light
goes on the light starts red than clicks to green after warm up.
Suddenly it's staying red. No sound. Is this a fuse? Is there any
easy way to check? Places in town are telling me they're going to
charge me $50 just to look , so wondering if there was some easy way
to tell if it was some replaceable part. The amp only cost me $350 so
don't want to spend too much for official repairs.

thanks for your assistance
jk