Hi morshi. I found a potential solution to your problem with your 5610 printing vertical lines at HP.com:
Vertical black lines or streaks
It's hard to tell from the rest of your message what other problems you're describing. I did find a troubleshooting page at HP that shows how to address general print quality problems:
Problem with quality of copies
If those links don't solve all of your problems, the Color printing issues page for the 5610 at HP has numerous other solutions:
Color printing issues
I know the name of that last link may seem misleading since you haven't described color printing issues, but the links on that page offer different general print problems and their solutions.
Good luck.
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