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I'd probably print a nozzle check to see what's up but would otherwise stop using the printer until someone else more familiar with that model chimes in. Continuous printing with a clogged nozzles/ink flow problems can kill the printhead.

Hence they reverted back to requiring a computer to perform service operations on the newer printers before finally moving to maintenance carts. They could just have made an access hatch for the waste ink pads and included the reset instructions in the manual. I wonder if the Maxify GX3000/4000...

While i agree with the opinion of regular cartridge printers being far more economical and convenient unless doing bulk printing however, i feel like there is something defective with the particular unit rather than the typical CISS on a canon behavior if it's not able to handle a slight...

it feels to me that amount of ink backflow in that scenario seems to be too much too fast even by megatank standards. Does the room experience large temperature swings if not it seems like a big air leak somewhere if ink rushes back within minutes of being relocated?

at a glance(from pictures/poking around with a flashlight) it seems like it uses the mariotte principle as most third party CISS tanks do albeit with a weirder tank design where majority of the volume of the air balance chamber in a regular ciss tank is replaced by an air inlet tube running...

Does ink level affect how fast air uptake forms when the printer sits unused? Does it occur far more readily before or after the 1000 pages mark? Not sure if its related but our G3010 seemed to have sucked ink from main ink tank towards its airbalance/buffer chambers somewhere around that...

I would love an open-source alternative to the Service Tool however a potential issue is keeping up with the changes with the internal tool for supporting new Product and Firmware releases since there is no protection within the printer itself against corruption by an invalid ST command, I'm...

I wonder if this problem starts to occur after a certain amount of pages printed or as the printer ages which could suggest that the carriage port/cartridge inlet is loosing its shape and seal.

The EEPROM save function will probably give you a softcopy of the CURRENT contents of the EEPROM which would be then edited in a hex editor to have your desired changes made before being flashed back using a hardware programmer. Do you still have the instructions for your CISS conversion ? Most...

maybe whether there is ink pooling on the underside of the printhead/carriage assembly on first print? probably worthwhile to check the mechanism where the printhead gets parked/cleaned for gunk.

I don't think the official service tool can flash a EEPROM dump so you'll still need a hardware flasher to do the job regardless.If the CISS carts can still print fine it's probably more economical to keep those running. you risk breaking the printer further by messing with the EEPROM and...

if it registers the ciss carts when reinserted it could be that the printer is programmed(e.g a printer bought overseas)/reprogrammed for another region as usually the CISS conversions reuse the original cartridge in 2 cartridge printers and just disable ink monitoring. if the ciss carts can...

It could be a browser related issue(calendar on archive.org breaks if an option to block sending referral headers partially/completely is set) or a plugin interfering with the site (e.g youtube blocking access when an ad-blocker is detected).

can confirm that it works (with 7-zip)

The Epson ink is likely to not work longterm if at all as the ink is formulated for the "heat-free" piezo printing rather than the thermal printheads the canon is using.

I think the plasticky build (relative to the price) of the megatank is what dragged their ratings through the mud rather than experienced problems with operating the device. In that regard the CLI22x printers would rate far higher than the megatanks.

Im surprised as well with the existence of the service manuals, The G3501 looks identical to the g3000 so that could be the case. Too old of a firmware may be the cause of the missing push button service mode (if the printer wasn't locked out) the G4000 SM mentions it being introduced in v1.030...

Don't be, been there once and can relate to the feeling of panic/dread of the possibility of killing the printer outright especially if a quick unplug/plug of the device elicits the same behavior. If you are using a PC to reset the waste counter do double check that the software you are using...

Not an epson person but prolonged soaking seems to help:

You can try leaving the printer unplugged for about 30min to a day and see if it will boot up after that as it could be that it is still stuck in service mode frozen.If it does boot into normal mode you can retry entering service mode. if it doesn't go into service mode or freezes when trying to...