With being stuck at home in lock down, had extra time on my hands to do some researching through the Net and YouTube for faults repairs for my Icom IC-706mk2g HF/VHF/UHF Amateur Radio, and it looks like I found a fix . . . it seems a common issue with the circuit trace being eroded due to the adhesive used on a pad stuck to the circuit board, solder in a bridging wire and the old 706 turned on again for the first time in 3 years.
IC-706.jpg
IC-706 fault.jpg
The circuit board eroded trace