[Amps] Harbach metering board in SB-220

[Pete Smith N4ZR]

I am trying to understand a minor problem in my SB-220, which otherwise 
works fine.  I originally installed the Harbach board because the HV was 
reading low.  It fixed that, but quite quickly thereafter the HV 
metering failed.  I *think* the relative power metering failed at the 
same time, but can't remember for certain - a common cause is puzzling 
because I can't see any commonality between the two circuits.

Can anyone help me identify components that are likely responsible?

-- 
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.