Next thing to try ... just to see ... is a total RESET as per the manual ... Trouble looks to be after the Low Pass Filter board and before the Ant A/Ant B area ... Let us know what you find please ... 73 Billy AA4NU > MP > No difference when I lower the power level. > Tuner will not do anything. The HI-SWR lites up. > No difference between A and B ant > Tnx for any help