I bought one firmware key to update my newly bought wf-2760, according to the guide that I need to confirm if the present firmware is able to be updated, guided was acquired from this link https://www.2manuals.com/product_info.php?cPath=107&products_id=1836.
and the test is positive, and after the firmware confirmation test, my printer is able to be turned off by press button '0' after the firmware verison showing in the printer screen.
so I bought a firmware key to do the firmware update in WIC 5.04, in order to keep all cartridge ink amount check to constantly 100%. I chose the LP24G5 in WIC for firmware update, issued at 24/5/2016.
HOWEVER, after the update in WIC 5.04 that claims to support 2760, printer finished the update and turned off itself, the firmware is still the old one (LP02I2), and all the ink amount were not reset to 100%.
I guess the update failed, no idea where am I wrong and