Display gives UO1 error reading.
 

Hi, I have a panasonic radio (RF-3700; GX700) about five years old and it
keeps giving a UO1 reading in the display and then switches off. It does
this after a slight physical movement of the radio. you can then switch it
on again after a few seconds and its working again without any trouble.

I have poked and prodded just about everything inside looking for a loose
connection (which i thought it might be since it responded to motion)
without success. any suggestions please?