the machine stays on about 20 seconds then shuts off, lcd goes black then turns on again for another 20 seconds or so, then off again. soon or later it goes into ready mode, but OFF again. i can get 1 copy out if i'm fast enough to push the print sw right after it is "READY" this will continue forever until the main sw is turned off. i've also checked with another data cable but prob is still there. when i disconnected the data cable the copier works fine w/o any problems. any help would be greatly appreciated