I've tried to use USB Imaging Tool "Merlin Version 4.0.7" to downgrade Wyse 3040 from ThinOS 9.1.x to ThinOS 8.6_710.

After a lot of test I've found an USB that is readable, I can select OS and start procedure.

The progress bar goes to 1,2,3...% and then it says "Imaging Failed", without any other information.

How can I fix it ?

Please help, I need to downgrade 80 Wyse to use already tested and configured ThinOS 8.6_710 before starting use ThinOS 9.1.

 

Andrea