Base radio works when it feels like it.

Question

My Excalibur SSB, AM/FM/SSB/CW Transceiver just stops putting out and receiving,the next day it might start to work again,maybe not.I looked for cold solder joints,the power supply is adjusted to 13.5 volts,also the RF/SWR meter stopped working even when the rig worked.Any ideas you might have would sure be welcome,thankyou.