quality of mediocre photo with Deskjet 6940

My Deskjet 6940 has never been a regular BW printing problems, but I can't produce a decent photo. Impressions are systematically too dark with contrast exaggerated, grainy and often striped. I have a new photo cartridge that tests OK, adequate level in the color cartridge. I use Canon (weight 45) glossy photo paper. I can't find the Technologies of life real (?) anywhere on any screen. If I print using HP Photosmart printing or iPhoto problems persist.

I have an iMac, OS 10.4.11, wireless to the printer, which is Ethernetted to my router. I use Easy Install software (from original disc) now, having struggled to get the OS X software install when I started from zero yesterday. Would it be useful to download the Mac OS software of 2007 on the site of HP? I can't distinguish the differences between 3 downloads of software available for Mac/6940.

And the strangest thing: there are a few nights after several tries, I managed to print a few impressions absolutely perfect, wonderful!  The next morning, I could not and have not been able since to understand what I could do right.

Thanks for your suggestions, answers.

Bob, I guess I have to give up. Yes, the photo with the vertical stripes was in landscape mode. Changing the color cartridge to get rid of it, but now the printer seems to want to print just part of the picture, and that the part is not so great. I printed a test page when it started and I had an e-mail response to a query by using HP, but after 2 exchanges with "Eleanor" I heard nothing more; She asked me to print the test page and give the results of some lines by e-mail. I must have scared it by responding effectively as requested.

I have so many variables to deal with printing - with the Finder, with iPhoto, with HP Photosmart, as I just can't play around with this any longer. I blown off50 photo paper pages (and bought another pack of another type that will now go unused) more new cartridges for photo and color (and my first photo cartridge was defective, so I had to return it to the store and I Exchange). And I still just 2 impressions nice to show it all.

So phooey! I really appreciate your help, though - you get Kudos for trying! I think I'll see if anyone on the Mac forums has some ideas, but I'm about to burn a disc and go to the Pharmacy!

Thanks again!

Tags: HP Printers

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