I highly recommend to no longer work with the original drive.
The images you created should be used for any further reading attempts.
And you should check your images as soon as possible to find out if they are usable.
I hope you create the backups with ddrescue ?
If you need help with extracting any data from either the original disk or from the images let me know.
For now the most urgent question is: how did you create the backup-images ?