Problems with my Amiga A1200

[Karlos]

When you get the "checksum" error, this is without a floppy disk inserted?

If this is the case, then it sounds like you have a hard disk installed and it has a validation problem. This should be fixable, but as your first interest is in retro gaming, let's look at the other issue for a moment:

the NDOS disks sound like old floppy games that are expecting you to boot them up directly. Instead of powering up the system and then inserting the disk, try inserting the disk before you power up. If the disk is an old bootable game disk and the previous owner hasn't messed about with the boot priority of the workbench partition (again, assuming it is a HD), your A1200 should boot from the floppy you inserted instead as it is assigned a higher priority.

Back to the checksum error, did the machine come with a set of disks for the operating system (Workbench, Storage, Extras, Locale and Install) ?

[Karlos]

Hi again,

yeah, the error pops up everytime I launch my Amiga, it does not matter if the disk is inserted.

Congratulations, you have a hard disk Unfortunately, it seems a bit poorly.

So, I really don't know if there are some useful Workbench, Storage, Extras, Locale and Install utilities. I may take a look, but I don't know what exactly I should look for.

Hopefully, something like this (AmigaOS 3.0, or commodore era 3.1):


or possibly this (Escom era AmigaOS 3.1):


Of course, you might have OS.3 or 3.9, but these came on CD only.

If you click "Cancel" on the error that pops up (it might pop up a few times), I take it the machine boots into Workbench (the desktop GUI) ?

What we need to do, is to see if we can repair it. There is a tool called DiskSalv that might be able to do the trick, but depending on the severity of the error, there might be a quicker fix.

The first thing to do, is make a backup of the existing Workbench drive. Or at least as much of it as can be copied. Do you have any other disk icons that appear on the Workbench screen after it has booted? Is there one called "Work" for example?