Ipod from china can't connect to pc anymore
 

my Ipod form china 8Gb model MD 889 i've try to update firmware for it 3.5.37v2.1b_FM , Full3.5.35,fw_digital_player_mp4_1.8_inch, but many time trying with another firm but i cound'nt find good ones. 1st i got problem with black screen , after try another now it not work anything even to connect to pc . any one help me please !!!