How to recover from a blank screen
 

i have mp3 player ATJ2051W and hynix cphiset ... i try to upgrade firmware but unlucky, my player is dead ... my pc didnt recognize the player .... :(

so i dissassemble the player and short the circuit, then i connect to my pc and get into recovery mode (ADFU). i start the firmware update program and i update my firmware using 683E(706_712)_FM2051_hy1GB_20051212.bin and finally I got my mp3 player working again but now the problem is my screen blank, although it can play music normaly.

how can i fix the problem for my screen??

thanks :D