K4IA:
>Master Reset still boots to a blank screen.
I've never heard you mention the
RAM Clear Reset. Surely you are doing this
as well as the Master Reset.
http://www.rfsquared.com/cms-files/help.txt
If not, after downloading the firmware, do the
RAM Clear Reset, Power Off, Master Reset,
Power Off, Power On.
73, Bill W4ZV