C5290 LAN and Maintenance Box Problem - Need updated firmware?

[toppc12 2]

Hello. I have 2 C5290 printers. The older one works perfectly with chipless firmware CT14I9, but the newer one has problems with LAN and Maintenance Box.

LAN port doesn`t work. Link is not established with the switch. Updating original Epson firmware makes LAN port work, so maybe the printer has a newer hardware incompatible with this older chipless firmware.

The Maintenance Box level doesn't go down, I don't need a maintenance box chip resetter in that printer, something that doesn't happen in the older model, where maintenance box level lowers over time, as it should.

I was wondering if you could make a newer chipless firmware for C5290 model, so I can use LAN on both printers.

Thank you.