Having had to provide support for over a thousand HP printers for the company I use to work for. Is the printer giving you any kind of error code? If so what is it. Try entering the error code into Google and you may find your answer there.
Also Google "hp photosmart c7200 ink system failure" that look at some of those links. You will be suprised what information you can find.
I can tell you the most common problem will be with the ink cartridge. Try taking a Kleenex and wipe the bottom of the cartridge and see if any ink comes off. Then see if that ink is wet or you are just wiping off old dry ink. Now dampen the Kleenex with a few drops of water and rub the cartridge head again to clean the head. Try the printer and see if that works.
HP had also included a microchip in some of their cartridges and the printer is able to read the usage date and the cartridge may be out of date.
I have never worked on that model so if it has more that one ink cartridge try cleaning all cartridges. You may have a bad cartridge. Also some HP multi cartridge will not work if any one of the cartridges are bad.
For paper feeding the rollers need to be cleaned. Use a damp lint free rag and hold it on the rollers. On some models holding the parer feed button will advance the rollers so just hold the rag on the roller and advance being careful not to get the rag caught in the rollers. NEVER use anything other than water on the rollers.
VG
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