[ScottishColin]

Here is the UG5 chip marking.

I was doing some continuity testing last night and intermittently got a connection between UG5 Pin 8 and Pins 1 and 2 of J10. Looking at the schematics, this doesn't look right to me. Might this mean I still have a short somewhere else?

Or should I continue down the replacing UG5 route?

Thanks.