Some good news. I disassembled the disk drive and found a loose cable inside the metallic cover that surrounds the actual drive.
I put the cable back where I thought it belonged and now the drive works again

I suppose it may be related to the ready.
Now I have another problem instead (not sure if its new or old), when I want to move my files from PC to a disk, I use disk manager,
but either disk manager isn't capable of writing single sided disks or there is something else wrong.
Unfortunately it seems like the disk drive in my WSX isn't working 100% either, when I format a single sided disk in the WSX I get
'disk error', so I have to format the disks on my Yamaha. Then I created a disk in disk manager that is readable on the WSX and
I wanted to copy the files onto the Yamaha formatted disk. This doesn't work either (or at least not very good), I often get write
error. The file size seems ok but sometimes the data is corrupted.
So now I would be very happy if someone could explain why the disks I create in Disk Manager doesn't work on my Yamaha.
I suppose it may have something to do with that they are single sided. Is there a way around this so I don't need to use my WSX?
Sorry for these rather basic questions but I haven't used diskettes in a long time (I used my ESE cart and gamereader to load it
until the ESE ram stopped working).