> My M-7000 commo terminal started experiencing problems about six 
 > weeks 
 > ago: after being turned or for a couple of minutes, the audio input 
I agree with the rest of the guys that have answered you: power supply.  My 
guess is that you've got a rectifier that's taken a power surge and now goes 
intermittant when it warms up.  If all else fails, start at the power lead-in 
and start swapping parts one at a time.
Alan
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