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Hacking printer firmware has been done apparently but not in any real earnest. Unlike mobile's I suppose the interest just isn't there.

I'm surprised no one has tried flashing their own firmware to take care of problems like this. Now if it were a mobile phone we were talking about I could do it myself, in the past I've done a lot of firmware hacking but printers, can't say I'd know where to start.

Out of curiosity how does the printer know the ink absorbers have reached critical mass, in there a sensor that detects it or is it just a ticking clock built into the printer's firmware and when your time's up ......well.

And a genuine two year guarantee to boot, again thanks to the EU...

Mmmn...I seem to be missing something here so apologies if that's the case. In your first post you wrote that you had just purchased this printer and that it appears to be approaching five years old and not working correctly. Now it seems to me your best course of action would be to return it to...

Interesting thread this. If you go into Google/Images and copy & paste " Circuit diagram of a Canon print head die " you'll be rewarded with many images & schematics of said item. Whether that gets you any closer to finding out what's wrong with it is another thing, but still plenty to read about.

That's good advice turbguy, I always print as slow as I can to reduce the stress & strain on all parts of the printer. Thinking about it I do everything slow to reduce the stress on me, with luck I'll last longer too !

Ah..great news, hopefully it sorts out your problem.

Funny, I was just posting to say sorry but I couldn't find that tool you were after and an alert pops up to say you have it ...well done ! Did it come from that 'copytechnet' website I wonder ? Anyway I hope it helps to get your printer up and running soon.

It's funny, I can find every type of firmware - driver - plugin and lord knows what else for that printer but not the tool required. It's a bit late here in the UK but I'll continue the search tomorrow...if it's out there I'll locate it !

Apparently the latest ver. no. is 1.80 not that it's any easier to find. Incidentally what model Prograf do you have, that would help to narrow it down a bit.

I'd stick that bog roll on ebay if I were you stratman, somebody would buy it. I bet The Hat would put a bid in for sure.

There's this thread... http://www.copytechnet.com/forums/canon/36767-imageprograf-l-printer-service-tool-ver-1-40-_-new.html That talks of the Service Tool, plenty to read if nothing else.

Try this link... https://www.usa.canon.com/internet/portal/us/home/support/details/printers/support-imageprograf-printers/imageprograf-ipf605?tab=drivers_downloads

Pardon my ignorance my background lies in electronics not chemistry, but is it known exactly why this gelling phenomena appears to occur only in yellow ink cartridges or can it happen to any ink if conditions are right ?

@ The Hat, Where's the problem with refilling the 650 cartridges ? can they not be reset or is it just not worth the hassle.

Peter's spot on when he mentions iffy ink ruining Canon print heads, that's how my own iP4000 bit the dust. Yesterday evening I spent an hour or so searching online for PGI-550XL black ink cartridges. I found dozens of suppliers selling carts from as little as £1 up to almost the price of an OEM...

I'm ok when it comes to re-filling cartridges, in my time I've replenished just about every brand of printer ink. Eventually I just came to the conclusion that for some one like me who's not a heavy printer ready filled compatibles was the way to go. However trying to find a PGI-550XL type...

Thanks for the heads up er... Hat! So what you're saying then is, if you really want to be sure of what's in the tank fill it yourself. Ross..

Hi all.. I recently sent off for some compatible inks for my iX6850 printer and on their arrival I read the wording on the box very carefully. The large black ink is labelled PGI-550XL and I assume the "PG" means it's a pigment based ink. Just to be sure I messaged the supplier for confirmation...