Ditto, here. I'd start by checking all your cables; make sure they are securely connected. If those are okay, then the next step would be to see if the P3 connector's solder joints underneath are secure. Chances are that a variety of things (heat, old age, corrosion, etc.) may have caused tiny cracks in the solder, working that loose. Simply removing and reapplying new solder to each of those pins will fix that. You'll need to disconnect and remove the entire analog board/power supply assembly to do that. If still no go, I'd recommend this, but only as a last resort. Before pursuing that, I'd check the power supply first. Chances are it may be dead, a part has failed or it needs adjusting. If the power supply is a failure, replace it with a matching Sony CR-44 or ASTEC model. The Sony power supplies had far less issues than the ASTEC brand.

73s de Phreakout. :rambo: