I recently bought a president washington base station radio.it worked ok powered up and everything fine... people say it has good signal, but low modulation. So today i gently blew the radio out with compressed air. both covers are off. i plug it into the wall and it powers up for just a second then dies.i have checked the fuse in the back of the radio and its good.any sugestions on why this thing wont power up. I never saw any smoke or anything.... i was carefull while i was blowing all the dust out of the radio.