From: can...@gmail.com   
      
   On Monday, April 12, 2021 at 2:25:26 PM UTC-3, ivan...@gmail.com wrote:   
      
   > I tried using the DOS 3.3 System Master disk but nothing happens. Tried   
   several other disks but nothing seems to get the drives to read. Insert a disk   
   and the light glows red but it doesnt make that drive churning sound.   
   >   
   > Any suggestions on where to start?   
   >   
      
   The obvious first place to start for me is to make sure that the disk drives   
   heads are clean.   
   You should open them up and use some cotton swabs to clean the heads.  My   
   favourite cleaning solution for this sort of task is "Ronsonol" AKA "Zippo"   
   lighter fluid.   
   Follow up with a dry swab.   
      
   Next check the diskette itself for blotchy appearances on the media. Or a   
   telltale concentric scratch on track zero (the outermost area of the diskette)   
   If you have dirt on your read-write head and scratched diskettes then your   
   disks are likely mouldy.   
      
   I'd clean the heads first, checking the swab to for dirt.   
   If you can get a good read of a diagnostics diskette the next thing I'd check   
   is drive speed.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)