Why won't my N64 output video?

After my original power cord died and I got a new one, my N64 hasn't outputted video or audio. I've gotten new cables, sprayed the ports with compressed air, repeatedly took out the expansion pack to see if that'll change anything, but nothing. I have no idea what's wrong with it. Anyone have any ideas? I'll try basically anything at this point. I just wanna play pokemon snap.