Unfortunately my NES has given up outputting video and left channel audio (I think the left channel audio is tripping, what I assume to be a, fuse in the amp as well making it shut off every now and then). Game loads fine, I can hear the game music from the right audio channel. Checked the outputs with the known working right audio cable but nothing.

I assume I’ll have to at least open it up to repair this but anyone has any suggestions as to what might need work (if it’s possible at all with these symptoms)?