Many: MD9000 machines in use after a period of time, appear this phenomenon. Is not loaded into the tape. Open the power switch, indicator light shows normal: load after the tape recording, flashing lights appear red. The LCD panel in English instructions Please Re - operateafterpushing: reset dution ". Machine doesn't work, according to the instructions press rest after the fault remains. U77service manual download site
 U77service manual download site
Appear this kind of circumstance can open the machine cover, each row line in the motherboard with alcohol sponge swab. Then warbler new fine lines, computer cover, a general fault can be ruled out. This is mainly due to the special small MD9000 row spacing. Often used in harsh environments, make line oxidation or loose, causing poor contact and 7 f method.U77service manual download site