Can't sync because of music issues since I installed Mavericks

Question

Recently I bought a new iPad mini wifi + cellular; in December I had added Mavericks; before iCloud I had always synched the phone with the music done manually, because I have music in my library from vinyl, cassettes, and CDs/DVDs, and obviously the earlier material wasn't from iTunes.  With the iCloud, and a newer iPhone, and then a new iPad mini last summer, I have still been ok with synching.  After getting Mavericks, over the holidays I got a new mini, and I have problems with all my synching.  (We can talk about photos later!)
iPad: 'Tunes has found music not on computer on iPad; transfer it or lose it.'  When I try, I get the message 'computer is no longer authorized'; it is, but I have tried auth'z'g again, deauthzg then reauthzg etc., nothing works.  I bought some music on the new iPad, which may be the cause.  But it would not synch right before that.  It was using an old apple ID name, and when I tried to get the name right, it wouldn't work, around and around, and in that process I changed to a new apple ID password.  So maybe that also affects things.
How do I get the phone and new iPad to work normally with the MacBook Pro?  I could erase the pad and start over, that would be ok; I only care to preserve the music on the laptop.  But I need to be able to keep these all in synch, the phone too; what settings will work, once I get this sorted?  I don't care, for a while, that there be no music on the ios devices, if that helps.
Thank you for your help.

Answer 1

I'm not sure what you tried already, but this worked for me with my HP:
uninstall all printer manufacturer apps and "utilities"
go to System Preferences > Printers & Scanners > Print
control-click on your printer in the column on the left
select "Reset Printing System..." and "reset" in the dialog that follows
do a factory reset on your printer. You'll have to consult the printer manual for how.
if you connect to your printer via wifi:
power down everything: modem, router, computer, and printer
power up each item in turn in the same order: modem, router, computer, and printer. Let each power up completely before moving on to the next
enter your wifi password in your printer so it can connect to the network
go back to printers & scanners and it should see your printer and install a driver for it from Apple
try using Image Capture instead of any HP scan utility