[tadad1]

drogekloot, When your player can no longer be detected by Windows or the MP3 Ugrade Tool The only thing you can do is reset the chip by shorting it as outlined in the Dead Player Recovery Guide.
This then puts your player into recovery mode and Windows will recognise it as an ADFU Device. At this point the player will only accept a full version firmware it will not load a dump. The Full Version firmware does not need to be exact for your player and as I said in most cases it will not recover your player but it will put the player into a state where it will now accept dump files. It does not matter if the screen is blue or black as long as the player becomes recognised as a removable device and the upgrade tool will load dumps without problem.
The true full recovery is then only possible if you find the right firmware for your player, this can mean many attempts with different firmware. I killed one of my players over 70 times before I found a firmware that worked.

If during this proccess your player stops being recognised again you must start from scratch and short the chip again, load a full firmware and then continue trying dumps.

I have found that it makes no difference what size player the dump came from. The firmware of a 2GB player could still recover a 512MB player. the only thing you need to watch is screen size for obvious reasons the dump off a 1.8 inch lcd player will not work on a 1.5 inch lcd player.