topic PRO-300 Printer - Still says replace Red ink when I already have ! in Professional Photo Printers

PRO-300 Printer - Still says replace Red ink when I already have !

AndyR — Sat, 17 Jan 2026 16:12:54 GMT

Hello,

The Red ink cartridge and Chroma Optimiser ink cartridge were showing low on the printers display screen just before Christmas 2025.

I ordered some new cartridges and replaced the Red and Chroma Optimiser cartridges on 17th January 2026

However, the display screen still shows the "Red ink cartridge needs replacing".
I have refitted the cartridge (incase I had not seated it correctly) however, no change.

I thought it may be useful to use the printers menu to perform a Deep Clean however, I can't get passed the "Red ink cartridge needs replacing" message so I can perform the maintenance Deep Clean.

I checked on Google and was advised to hold the start/stop button in for 5 seconds however, this doesn't do anything !

I am stuck !

Any help would be appreciated to resolve the problem.

AndyR

Re: PRO-300 Printer - Still says replace Red ink when I already have !

jrhoffman75 — Sat, 17 Jan 2026 16:36:18 GMT

Is the red ink cartridge flashing when you center the print head? Is it an OEM cartridge?

Re: PRO-300 Printer - Still says replace Red ink when I already have !

AndyR — Sat, 17 Jan 2026 17:36:20 GMT

Hi John,
Thanks for your reply.

Well as all these things reveal themselves given time..... I spoke to my brother about the problem this afternoon:

I had installed some Non - OEM cartridges and most seem to work fine however, my brother said he had done the same thing with his HP printer.

What he discovered is most of the Non - OEM cartridges work fine but not all !
He said they are very hit & miss, he believes it's often the electrical wiring within the cartridge, which can be of dubious quality.

So I have learnt my lesson !
I have ordered a new set of Canon cartridges from the Canon UK website, hopefully they will solve the problem.

I looked up Conway on Google Maps, looks like you're in New Hampshire.
It looks very nice.

I am in Lichfield Staffordshire, home of Dr. Samuel Johnson 🙂

Thanks for your support,

AndyR