I bought a Railking Berkshire 30-1760-1 engine with PS3 knowing there was an issue with the electronics but I thought it might be an easy fix (drawbar, loose wire, etc). Not the case though for it looks like a problem with the tender board. I would like to attempt to replace a component (identified as U20) that I pointed out in the 1st 2 pictures. This appears to be the only obvious problem. I have had success in replacing PS2 smoke unit FETS so I feel fairly confident I can replace this. Your generous assistance is requested in identifying the component and providing a Digikey link so I can purchase a replacement.
I have tried both conventional and DCS but get nothing other than a garbled sound from the speaker and then it lasts a few seconds. I have not been able to add the engine to my remote. Any other suggestions from you or the other MTH experts would be most appreciated.