For this test, I initially upgraded a Dell Wyse 3040 ThinClient with ThinOS to 9.0 with the Dell Wyse Management Suite 3.0. After my tests were finished, I wanted to use 8.6 on this device again, as I use it mainly to reconstruct customer issues, and most customers still use 8.6.
Go to http://downloads.dell.com/wyse/USBFT/ and download the latest Version of the Dell Wyse USB Imaging Tool, which is as of today version 3.3.0. You should also consider downloading and reading the User’s Guide.
Install the app on your Windows PC.
Next, you have to download the proper Merlin Image for your device not the raw image, in our case a Dell Wyse 3040: https://www.dell.com/support/home/de-de/product-support/product/wyse-3040-thin-client/drivers
OS_Merlin_v8.6_B013_3040_ENG.zip
Extract the ZIP files until you reach the .RSP file:
Now prepare a 2GB+ USB flash drive and format it with FAT32.
Next, start the USB Imaging Tool with Admin permissions. Select the correct USB-Drive and select Image Push mode in 64 bit. Press the + button at the bottom and select the WTOS_3040_8192_0.rsp file. Confirm your configuration and let the tool create the USB drive.
After the USB drive is created, eject it from Windows and plug it into your Dell Wyse 3040 with ThinOS 9.0.
Warning: Don’t use the blue front UBS 3.0 port, that didn’t work for me. Only the two back ports worked for me.
Start up the device and press F12 until you the pre-boot selection menu appears. Select the Device:
UEFI “YOUR USB STICK NAME/VENDOR”.
Hint: If the USB device does not appear in the boot menu, you may want to enter the BIOS settings and reset it to factory defaults.
The default BIOS password for Dell Wyse devices is: Fireport
Source: https://www.dell.com/support/article/de-de/sln290687/dell-wyse-hardware-what-are-the-bios-passwords?lang=en
You’ll now boot up the imaging menu and select the prepared 8.6_013 image, which will downgrade ThinOS from 9.0 to 8.6:
Press OK to start the process:
Wait until it’s finished:
After the process finished successful, remove the USB drive and press the restart button:
The setup will continue, finish and leave you with a Dell Wyse 3040 ThinOS version 8.6_013:
That’s it, feel free to ask questions and leave comments below, thank you!
Ps.: This method might also be useful, if you ever encounter a bricked device.
Thanks Marco, this is exactly what I’m looking for.
Thanks Marco, I used this after a firmware bug I found in 9.1.113, however when downgrading from 91.113 I found you have to disable secure boot in the bios or you can’t boot to the USB stick
It does not work for me on 5070. Keeps getting an error code 233.
If I pull an image from a working 5070 with 8.6, and try use that to downgrade a 5070 with ThinOS 9.1, I also gets error code 233
Had the same issue.
Try the following:
On the USB-stick you’ve created browse to the image-folder and open the Commandsxml.xml file and change FFFFFFFF</mask into 00000000
You are awesome thanks for saving the life š
Thank you, it helped
My fix for this on a 5470 was to edit the commandsxml.xml (found in the image-folder on the USB-stick).
There is a ‘FFFFFFFF’ section and when you replace this with ‘00000000’ it should work.
I did the change from “FFFFFFFF” to “00000000” and disabled secureboot
your firmware version is simply wrong. there is pcoip and no pcoip release and when the version does not match it give 233 error on upgrade process
Thank you very much, DELL-Support is awful, instructions on the web are totally faulty … my problem is, that after the USB-Boot it shows no image-file to choose, despite the fact that I prepared the USB-Stick exactly as you have written.
Regards, Alex
Did you disable secure boot?
I have the same situation. Prepared by USB. Booted from a flash drive. The menu for selecting an image for installation appears. But there are no images in the list.
Would this work to image a 3040 with ThinOS 8.6 to 9.1? I went through the process and it seems to have gone gine (no errors) but the device still boots into 8.6. Weird.
There is a Merlin Image for ThinOS 9.1 available, so I suspect it is possible to upgrade from 8.6 to 9.1 with an USB-Stick, although I never tried, because I always upgrade with the Dell Wyse Management Suite 3.x, which worked very well.
https://www.dell.com/support/home/en-us/drivers/driversdetails?driverid=3jxdx&oscode=thn80&productcode=wyse-3040-thin-client
Thanks a lot for your guide.
However, i get stuck in 100% of the process…
“Operating systems (In Progess)…”
100% stucks, don’t get the “done” image.
Any idea?
thanks.
Can confirm, tried again today, with the same version of the Imaging tool and the same version of the Merlin rsp file, and now I get stuck at 100%. Still searching for a solution.
Thanks for this great tuto Marco, it worked fne for me.
Regarding the process stuck, I simply turn off the Wyse by pressing the start button. The downgrade process was sucessful once booted up.
also had the same problem it was stuck on 100% but i just restarted, adn removed the usb, it continued to finish up the setup, all was good
Yep – does this – just wait a few minutes after 100% is shown, then power off teh device, pull the USB drive and power on – setup should then complete.
Same Same š
However, i get stuck in 100% of the processā¦
āOperating systems (In Progess)ā¦ā
100% stucks, donāt get the ādoneā image.
Downgrade from ThinOS 9.1.2101 to 8.6 -Merlin Image 8.6.710
100% Stucks – š
Please help me
Your page is more usefull than all the Dellpages together. Thank you!
Also did not show the USB drive in the boot menu for me. In addition to disabling Secure Boot, had to enable the Option in the BIOS Setup -> “Enable USB-Boot” under USB Settings.
Sollte der USB-Stick in der Boot Auswahl nicht angezeigt werden, gehe mit F12 ins BIOS Setup und dort muss unter USB-Einstellung, “Enable USB-Boot” aktiviert werden.
Impossible for me to set up back secure boot on after downgrade.
Confirm: changing the Commandsxml.xml file and change FFFFFFFF into 00000000 works
Dell USB tool 3.1.
ThinOS downgrade from 9.3 to 8.5_115 PCOIP optimize Wyse 5070