WF-C5710 - Activation Code failed -3

[WF-C5710 - Activation Code failed -3]

This time it worked. Thanks for your help. =)

[WF-C5710 - Activation Code failed -3]

Is there another thing to do?, the actual chip of the cartridges are getting low and I will need to buy ink, it is expensive.

I have chipless cartridges ready to be installed.

[WF-C5710 - Activation Code failed -3]

Hi, I tried again from the start, Transfer firmware by normal mode, open WIC Utility, Stopped all epson running apps, check firmware version, it is CU26I9, open licence.exe, pressed Activate Online, paste Key copied from mail, "Activation code writing is failed - 3" message received again.

[WF-C5710 - Activation Code failed -3]

Hi, I did buy a C5710 recently. I already have five of the same printer and no problem converting it to chipless.

But with this one I am having problems.

I follow the instructions of https://www.2manuals.com/product_info.php?cPath=107&products_id=1940 about uploading firmware

I verify because of "If firmware version is CU26I9 - firmware has been uploaded successfully" part with the WIC Utility and everything is good, version number is CU26I9.

Now the Activation Key I already did buy and downloaded the Licence.exe app, I press Activate Online, paste the emailed code and the App shows Error writing...

I have reinstalled the firmware about three times, verified the instructions everytime. Verified the FW version.

[WF-5710 - Activation code writing is failed - 3 - how to solve?]

HI, This topic title is about C5710, but info is about C5790, will this work?

I have a C5710 and already repeated the normal proccess about four times with the resulting  Writing is failed message.

Is this topic correct? (C5710 but using C5790 firmware)