Floppy Flopping

[Managarm]

I seem to be asking a lot of questions on here at the moment.

This afternoon I was trying to transfer some networking programs from a CD to my Amiga. I inserted a 720k PC disk copied the files to it and then stuck it in the Amiga. The problem is it won't recognise the disk. I just get "PC1:NDOS" or "PC1:?". I tried different disks and got the same thing. Then I tried to format a PC disk on the Amiga and kept getting the message "Could Not Format Cylinder 0". I then mounted PC0: and have the same problem. In fact it's worse, the drive has started finding errors on nearly every disk.

Also it seems to have difficulties formatting a normal Amiga disk. I get the same "Cylinder 0" message a lot of the time. I have no ideas what's going on. The problem is affecting both drives and it was working fine the other day. I've removed PC0: and PC1: from Devs and tried mounting them after startup, I've tried a vast amount of disks, I've formatted the disks on a PC - nothing works. Could my floppy controller be dying?

Any help would be much appreciated.

[Managarm]

I'm having the same problem with both drives and I've made sure the disks I've tried to format under Windows 2000 are low density. I've got disks that were formatted a while ago that the Amiga won't recognise any more. Yet when I put them in the PC they show up fine. The Amiga refuses to format any 720k PC disks. It's really annoying, it all worked fine the last time I used it.

[Managarm]

It's an old Amiga 1200 I've got - Commodore badge. I've put 720k disks in the PC and they seem fine but the Amiga won't recognise them.

[Managarm]

Hi, I live near Finsbury Park.

[Managarm]

I've just had a horrible thought. I got an ethernet card yesterday. I plugged it in whilst the Amiga was switched on. Could this fry something on the motherboard that would suggest why the disk drives are acting up?

[Managarm]

Yes it was a PCMCIA card. I plugged it in with the Amiga on as the accompanying leaflet said it was a way to avoid some sort of PCMCIA bug in the A1200.

[Managarm]

Hi,
I cleaned both drives... nothing. I unplugged the extrnal drive and reinserted it... nothing. I still have perfect audio but I don't know enought to disconnect the internal drive. It's got to the stage where no disks will format, be they Amiga or PC. This could be new A1200 time I fear

[Managarm]

Sorry to dredge up an old thread but I ignored the Amiga for a couple of weeks to see if it righted itself. (It didn't.) I've had a brainwave; could it be the power supply? I got this A1200 from Ebay and it came with one of those lightweight power supplies. When I installed an accelerator and an external floppy drive it used to act up. I swapped the brick with that from my A500+ and it was fine. Could this power supply now be dying? I'm tempted to bid on this...

http://cgi.ebay.co.uk/Amiga-1200-power-supply-60-watt-high-power-version_W0QQitemZ8235936475QQcategoryZ98928QQrdZ1QQcmdZViewItem

Could it be a solution? Am I clutching at straws?