Instead of trying to get yourself killed, first of all read the manual, maybe you dont know to operate the deck. Second if the deck still is giving trouble, start with connecting a dim bulb tester, best, in connection with a variac, if you have current to the fuses and they dont blow, there is failure farther inside the deck, and the dim bulb will show you if it is so, then check the schematics and start looking for failures, not working mechanics or electric components.
If you dont have any knowledge about electronics, leave it to a repair shop, BG are not that complicated and a good audio technician should be able to get it working.
Location: Mexico city
Printing machine technician
Restored various 1960-70 items
Rock and Roll music
Collecting Vinyl
Restored Jukebox Wurlitzer 1050