WF-3640 WIC Firmware Downgrade Not Working in ROM is not writable Posted May 15, 2020 · Report reply I ran into the same exact problem as the in the begining on this thread. Same Black screen with white letters ROM IS NOT WRITABLE.
WF-3640 WIC Firmware Downgrade Not Working in ROM is not writable Posted May 13, 2020 · Report reply I am having the same problem here I bought a key yesterday as the software version 5.57 said it supported firmware downgrade for my printer model wf-3640 with the purchase of a firmware key. Has this issue been fixed?
WF-3640 WIC Firmware Downgrade Not Working
in ROM is not writable
Posted · Report reply
I ran into the same exact problem as the in the begining on this thread. Same Black screen with white letters ROM IS NOT WRITABLE.