My Rega Elicit (MK1) clamshell amp has been acting up poorly the last few months with issues suddenly turning to the worse the last couple of days. Problem is intermittent with one channel falling out occationally. It used to be the right channel and often only after the amp had warmed up properly. On such occations a polite but firm strike with the fist on top of the amp would usually make it behave normally again. The last few weeks however the amp has behaved nicely - until a couple of days ago when the left channel all of a sudden started to distort heavily - to such an extent that I had to inspect more closely my newly installed turntable cart. I then found that the distortion was present also when playing digital files through the aux channel - hence no issue with the turntable then. Now the left channel is more or less dead. If I turn the volume control fast around I may force the left channel into action again for a brief moment, but it will then quite quickly fall out again. I had the master board resolded a few years ago, but I realise that other parts like transistors and capacitators might be deteriorating by now (as the amp is closing in on its 30th anniversary). But intuition tells me that the problem at hand might be related to either the volume potentiometer or possibly the speaker relayes falling apart. Is there anyone out there with actual tech insight into this issue who might point me in the right direction here? Kind regards