To find/check the regulator for proper voltage is one half. Once you find the regulator and it has the proper output; then put your Viagra board +8v feed wire on the same trace of the regulator. Go right to the source. Think that ExitThirteen's advice is spot on too; as that JP# he gave is also on the same regulator output as well.
the 959 i had all i did was cut 2 wires and install 2 switch's and i had above 40 and below 40, no board needed
Let me get this straight: DTB put in the Viagra board and it didn't work as it was supposed to?
Usually if the channels aren't working on the upper and lower freqs, it is because the PLL loop is out of lock because of too little or to much voltage fed to the VCO.