Sony PSX-60 turntable - dead or alive?

I have just hooked up my turntable after years of inactivity, and the sound quality has deteriorated. It is a Sony PSX-60 with a Stanton 681-EEE cartridge. It plays, but the signal is now weak ( about half what it was) and just sounds lousy. Anyone know if this is a turntable, or cartidge issue? I've tried two different systems, as I thought it might be the preamp.