What do you mean by it doesen't respond? If it doesn't spin, its probably seized up grease. If it spins but makes no sound, it might be a bad cartridge. Either way it does need a lube job, but it may or may not need a cartridge. Ceramics were not exactly known for being indestructible.
Also, standard mentions regarding old capacitors that should be changed for safety and reliability, and a mention about the German radio mode switches that always need a good cleaning. Both have been beaten to death, so I won't bore you to death repeating it all