Use genuine printer cartridges.

[#1]

I have an Epson WF-3540 plugged into my router.
I know it's advisable to use genuine Epson cartridges but I succumbed and have been using compatible cartridges.
I seem to have paid the price because the wired network has failed.
Fortunately the wireless connection is working fine so it's business as usual.
You wouldn't think a non-genuine cartridge would have such consequences.

[#2]

It wouldn't

[#3]

I guess if they're chipped anything could happen.. I gave up on compatible cartridges after the last printer was killed by them.

[#4]

I'm more likely suspecting a relatively recent firmware update.
I don't use the printer daily so wouldn't notice a problem immediately.
I don't imagine it's possible to 'roll back' the firmware to an earlier version.
Still, as I say it works fine on Wi-Fi.

[#5]

With your electronics and gadget history, I am surprised you assumed the compats were responsible..... presumably, from your last input. it had been running ok on them prior to its current state... therefore it is highly unlikely they are responsible...

[#6]

Loss of the wired connection cannot be connected to compatible cartridges!
Whenever my laptop loses it's wired and goes wifi I always reboot it and the router, that usually sorts it out.
Or, in Device Manager I disable and re-enable the Network (wired) card!

[#7]

I've seen a "compatible" toner cartridge leak all over the printer before... That's messy 
Is printer ink conductive, If so I guess some could have leaked and shorted something out but it's a bit of a long shot.

[#8]

Maybe your printer needs some Epsom salts to clear the blockage?

[#9]

I really must try to keep my wicked sense of humour under control
The wired ethernet on the printer has died and the printer config screen tells me no wired network connection is available.
If I power cycle the printer with Wi-Fi disabled I get a brief ethernet light on the router.
No connection is then available and the printer shows as offline.
I'll have a play tomorrow.

[#10]

Buy a laser printer.

[#11]

Quote from: Strat

I really must try to keep my wicked sense of humour under control

Very Droll ! 

[#12]

I am sure that when Pandora opened her box, the box read Epson on the outside.
Not the best firmware / software in the market. Plus, they might work with other makers carts... or not... or print it all in magenta
I assume the firmware update was on the printer? A firmware updgrade will often default a devices settings. Is your router seeing the printer on the LAN? Check the connected devices option on the router management pages. Do you have any firewall rules or port mappings to that device? Or does the printer have a 'WiFi preferred' [by default] setting on it's management pages?

[#13]

Yes, the firmware was on the printer via the Epson upgrade app installed on my PC.
No firewall rules or port mapping.
This morning I....
Removed the printer from Devices and Printers.
Restored Default Settings on the printer.
Rebooted the printer with ethernet cable attached and it's now working again.
Next time a firmware upgrade rears it's head I'll keep a close eye on things.

[#14]

Quote from: Strat

Next time a firmware upgrade rears it's head I'll keep ...............

                                                                                                          .......................The compatible cartridges in a box under the stairs, until it finishes 

[#15]

Perhaps Strat needs Hire Purchase to buy genuine cartridges!