Hello everyone

I have two 5"1/4 floppy disk drives. One didn't work at all and the other one was very picky I cleaned them the best I could but it didn't help at all. But both of them did some marks on the floppy which was odd since they were completely clean. But I figured out that the heads' spring was too strong and once I loosened them, the picky floppy disk drive was munch less picky and the one that wasn't working was able to format one floppy disk (though it can't finish because it can't write "BOOT" and so the formated floppy isn't readable) it's far from perfect but it's still munch better than before. Before that, the bad unit always said "invalid support or incorrect track 0" and the picky one said the same thing with floppies it didn't like

Have you heared of such things before ? I'd like to repair them completely (well I don't know if the "picky" one isn't already fixed, maybe the floppies that still doesn't work with it are just bad, but the other one is still in a poor shape since it can only format one floppy out of 7-8 and it can't even finish the format process)