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No, not by just hearing one's story. They will likely want to try to recover the existing printhead, so it's always important to interface with tech support without a load of preconceived notions. Let them troubleshoot and diagnose. If the printer is still under warranty and hasn't been abused...

Agree with Smile, it looks like an electronic problem. If it were mine, I would contact Canon support right away, tell them your story (be polite) and let them troubleshoot. Don't be surprised if they send you a new printhead pro bono. Canon appreciates customer loyalty. Oh and don't mention...

No guarantees, but completely drying the PCB would be imperative, otherwise it's likely sudden death for the PH.

Thanks for thw heads-up. I'll be on the lookout for deals on iP4500.

That's a good thread and yes, I would soak the head overnight making sure that the PCB stays dry. With a syringe you can carefully place water onto the intakes for the soaking period. Distilled water heated to about 140F is a plus to start off the soak. After the soak, take a syringe adapted...

PM Trigger 37, I beleive he's worked on MP780's

Do not, repeat do not allow the PCB to get wet during printhead cleaning !! Search HERE, not the web on "printhead cleaning" Do not take the head apart. IMO, compressed air is OK to speed drying, I don't rely on it at all for cleaning. Successful printhead cleaning requires careful, accurate...

Yeah, it smells spammy. But why not break it down a bit. Two reasons I wouldn't buy anything from iowaink: 1. No Free Shipping on orders under $50.00 2. They don't identify the remanufacturer of their cartridges. Who knows, they could be crappy OA100's or some other low-end Chinese brand.

TY Watershield + Hobbicolors. TY Watershield Silver just released.

I've recovered several iP1500's from the state you describe. Most all of them required me to manually unclog the printhead out of the machine. Search the forum here for "printhead cleaning" and you will get plenty of information on how to proceed. Please post back if you have any questions.

Yup, and if your printer uses pigment based black ink for text, print a text only document to exercise this portion of the printhead as well. Now, if I could only practice what I preach...:P

Presently using OEM Canon carts.

With color conrtamination as you describe, one of the suspects can be the cartidge seal. Not the seal where you refill into, but the seal where the cartridge outlet port meets the printhead. A few things to consider: A cartidge that is over-filled and not "milked" can cause flooding which leads...

It is a black cartridge, sounds like it performed correctly if I undestand your post. http://h10010.www1.hp.com/wwpc/us/en/sm/WF06c/A10-12771-64209-64548-64548-3383899-3383964-3384386.html

1. No. 2. Yes. All inkjet ink is not created equal. You can search the forums here and get opinions from experienced refillers on which inks that they prefer. My personal preference is Hobbicolors UW-8 for my Canon printers.

Yes, plugged = clogged. I have no experience with continuousink, perhaps someone on the forum has knowledge of their inks ?

I would suspect that either your ink is not up to par and plugged your printhead or you had a flow issue with the CIS and overheated your printhead. I would lean toward "plugged" and try cleaning it. What brand of ink ? If you use the Forum Search function, you will find a plethora of...

If you look at a brand-new, genuine Canon cartridge, ther will almost always be a "dry area" at the upper-most part of the sponge. I believe that they use this second, less absorbant sponge to help create a positive airway from the top vent to the bottom vent for even discharge of ink. I...

Try Atlantic Inkjet for those non-OEM carts. I'm a re-filler using Hobbicolors UW-8 inks. Once you start refilling (very easy for your carts!) you will never go back.

Read the whole thing, from cover-to-cover. Should you have any further questions, by all means ask. Report back with your findings.