have taken in a mics with 7.0 softgware. system never boots up. all sets just blink on lower display next to line buttons. have open software holder case and shorted battery. have power up and down the unit several times. pulled out all cards and booted up with just the software card in. any other sugestions. also can you pull out the software card with power off from another ksu and frog the software cards without loss of programing on the good ksu.