Batboard

Hey guys
I have a Model I 45watt MCS2000, on a 800MHz trunk system...
All a sudden the radio receive sensitivity has gone to crap, and the radio wont affiliate.....it tries to, the light flashes, its drawing lots of current so I dont think the PA is shot....but then it will display NO SYS ...but it will continue to receive at times just with horrible sensitivity....

Any ideas?
A fellow I know with a local FD said theres is doing the same thing now suddenly, so hope its something common...

start with the obvious, the antennae? try to plug a simple magnet mount into it

Tried different antennas, showing crappy rx on the monitor, I just dont remember the exact figure right off, I only have trunk channels in it right now and forgot what the test mode frequency is...