Wont print photos - paper comes out blank or message saying no paper (when there is) or paper gets jammed.

Its very difficult to answer a question with limited details
1. WONT print photos ( is this an Ink issue Have you checked ink levels and have you gone through the ink cleaning methods ie cleaning clogged heads, Nozzle checks 90% of the time the reason why printer is not printing correctly is because the nozzle or heads are blocked, And sometimes it can be the ink cartridge itself that is faulty.
Again with the paper issue it does not take much for a paper Jam alert to pop up disconnect turn printer round use big light and double check there is no snags of paper trapped in there if you have a compressor which is ideal for blowing out paper dust and snags
Again with limited details it hard to advise but I hope this helps