Lexmark Z705 InkJet

[Jeremy]

My fiancee's mother has a Lexmark Z705 InkJet Printer which is several years old. Recently it refuses to print anything. After replacing the cartridges several times, the most it spits out are light/dark blue lines, no black.

I know nothing about printers, hence my posting here for assistance. I'm sure I could find answers on Google, but I just love all you guys so much that I couldn't help but ask, y'know?

Anyway, can anyone offer me any troubleshooting suggestions other than the painfully obvious "Get a new printer" or "Get a laserjet!"?

Thanks guys.

Take care.

Jeremy