Print Quality Officejet L7555

I'd appreciate any helpful suggestions anyone can offer. I've had this printer for several months, and it's been terrific. All of a sudden, the colors are garish, greens too bright, blacks part greenish brown, browns orange, just all messed up. Pinks and purples seem okay. I thought maybe it was because I was using non OEM inks. So today I spent $100 on new HP brand ink, and the problem is still there.
On another note, the default printing seems to be stuck on mirror image on, and I keep changing it to off in every profile I have saved, except General Everyday Printing, which I cannot delete or edit. And this is annoying. Every time I want to print, I have to go in and change the mirror image to off because it comes up as on.
I have plain paper selected, normal quality, and am printing on a high-end color inkjet paper with the proper side up. But I've tried varying the settings for quality, paper type, adjusting the ink saturation and brightness. I've also printed on card stock and photo paper with the same result. I've fiddled with just about everything I can fiddle with, to no avail.
Does anyone know if it might help if I reloaded drivers/software? Might I need to replace printheads that are less than a year old?
Thanks for any advice you can give. I'm totally frustrated by this now.

Thanks for the reply, DexterM. I have used the clean printhead utility from both the printer and the HP Solution Center toolbox. Curiously, color copies are perfect. Printing from an image scanned on the Officejet are coming out perfectly. The only thing that's printing weird is photos or pictures from .jpg or other graphics-format files. My black/yellow printhead does have a "monitor" yellow-light status. According to the Extended Self Test Report, I had a total page count of 1446. It doesn't seem like the printhead ought to wear out from that many.
Incidentally, while using the replacement non-HP inks, which are supposed to be fully compatible, I was able to print pictures very well. This is a very recent problem.
It seems as though the colors are getting scrambled somehow in the interpretation from the picture files. If the printheads were damaged, it seems like a copy wouldn't come out just right. Any clues as to what might be causing this? I changed the print processor from the hp one to WinPrint, just to see if that made a difference, but changed it back because it seems to be the same.
Anyway, thanks for your help.
Any clue how I can get the mirror thing to off on the Gen. Everyday Printing shortcut setting? That's so weird. Thanks in advance.
Irene

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Hi @Hazelg
I'd like to help you with the poor print quality you are experiencing when printing from your Officejet 8500. Please use the following document to troubleshoot the issue, and let me know the outcome of your efforts; Fixing Print Quality Problems for the HP Officejet Pro 8500 Premier (A909n) and 8500 Wireless (A909g....
I hope this helps.
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Sunshyn2005 - I work on behalf of HP

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Hi @helenincardiff,
Welcome to the HP Forums!
I understand that your HP Officejet Pro 6830 is not printing properly. I am sorry to hear this, but happy to help!
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I work on behalf of HP
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Hello jnedved,
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HevnLgh
I work on behalf of HP
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Dale007 wrote:
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Hello novemberwolf,
Welcome to the HP Forums.
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This question was solved.
View Solution.

Hey,
To clarify for you and answer your new questions on the printers self maintenance.
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I worked on behalf of HP.

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Hi @Frogg1977,
Thank you for visiting the HP Support Forums! I understand you are running into some print quality issues with your HP Officejet A, at first the cyan would not print, but now the yellow has stopped printing as well. If you look on the printhead it advises not to be shaken, please remember for future reference to avoid any damage.
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http://www.hp.com/cgi-bin/hpsupport/index.pl
HevnLgh
I work on behalf of HP
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Hp c510a print quality

Graphics print well but photos too dark. How can I properly set print preferences?

Hi there nzsam, Welcome to the Forums!
I came across your post in regards to your issue with your Officejet 6700 not printing very nicely in magenta and yellow. I have researched this for you and suggest troubleshooting through the problem by using the guide below for print quality problems. I am hoping this helps clear up the cartridge issues.
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If the troubleshooting does not help resolve your issue, I would then suggest calling HP's Technical Support to see about further options for you. If you are calling within North America, the number is 1-800-474-6836 and for all
other regions, click here: http://www8.hp.com/us/en/contact-hp/ww-contact-us.html
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R a i n b o w 7000I work on behalf of HP
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HP6600 Poor Print Quality

Hi,
I am contiinually having to run the Printhead Clean feature before I can print with my Officejet 6600. Once the cleaning is completed, the print quality is fine. Prior to running the cleaner the printing is smudged, blurred or missing, and is often only black (i.e. no colours).
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This question was solved.
View Solution.

Hello @Crossy,
Generally you want to update the Firmware via a USB Cable connection as it is a direct connection. You don't want any interference when you run a Firmware Update as it reprograms the printer. If the programming update is interfered with in any way than you're pretty much left with an expensive paper weight.
In your specific case, because your printer is currently running version MIM2CN1435AR than that is the latest version. The Firmware Update tool will not allow you to resend the firmware.
The last step now would be to contact our Australian support team at: 1300 721 147
HP Australia Support Center
I wish you luck!
X-23
I work on behalf of HP
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Print Quality Officejet L7555

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