Did you just buy this?? If you did, maybe you can get a DR5 cartridge that has a new capacitor in it from the people you bought the system from. They should stand by the system (most reconditioned systems have at least a 90 day warranty)and the system is really no good at all with a bad Farad Capacitor.

But, as nfcphoneman sez---you might have to get someone in there to troubleshoot. Otherwise, you may be buying parts that you may not need.