technoboy , since the S1fwx extracts a firmware with missing files, and you flashed this firmware into your player, the missing files are what caused the screen problems.
What i can suggest is to try all the v9.0.xx series firmwares in here
http://www.mympxplayer.org/actions-9...mare-dc37.html
If all of them do not work, try contacting your seller and see if they have the firmware to send to you. Also search the CD that came with your player, sometimes the firmware is in it, it should be in .fw or .bin format.