My macbook pro won't recognize network printer

Macbook pro is late 2011 running OSX 10.7.5 - Lion, connected wirelessly to home network with airport express.
Have an HP deskjet connected with a cable to a MacMini mid 2011 - Yosemite.
macbook always has problems printing to this printer on home network. "printer not found" or "printer not connected"
Normally I turn off the printer and back on and it will print. Now I just get message "printer not connected"
I deleted the printer and tried to add it back and it will not find the printer.
Is it possible to reset the airport express? Will it benefit me? Is the issue that yosemite and lion do not get along?
I really would like to be able to print from the macbook without having to unplug printer and plug it directly to the macbook.
Frustrating to say the least!!!

I had almost the same thing happen the other day - kept getting a message that my printer was not connected. I went to the printer setup on the printer's panel and the IP address was correct, everything looked as if it should be working. So I just reset my router - figuring that would fix the problem. No go. What I finally ended up doing was resetting my router to factory settings and setting it up anew.
And that's what worked for me.
Clinton

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MacBook Pro won't detect network printer Canon MF4150

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The warranty must be close to running out. Take it ASAP to the Apple Store or AASP and have it checked.

My MacBook pro won't recognize hard drive I put in it. It boots only to a white screen unless I boot to my recovery USB. If I do that then I can select my USB and my external time machine drive in the disk utility, so no problems there. But what do you

My MacBook pro won't recognize hard drive I put in it. It boots only to a white screen unless I boot to my recovery USB. If I do that then I can select my USB and my external time machine drive in the disk utility, so no problems there. But what do you think it is? It won't recognize any hard drive I put in the machine, so might it be the sata cable?

Boot the Recvoery USB, use Disk Utility to select the internal drive makers namea and size on the left.
Now select erase and select the midde option and click erase, it will take a bit to complete but it's best for the drive.
Now select Partiton tab, click the big box and Options: GUID and then Format: OS X Extended journaled and click apply.
Quit and you should be able to install OS X now with your Apple ID and password.
see
http://osxdaily.com/2011/08/08/lion-recovery-disk-assistant-tool-makes-external- lion-boot-recovery-drives/

MacBook Pro won't recognize 1TB external drive

Hey team,
My mid-2010 MacBook Pro won't recognize my WD My Passport 1TB drive. I was copying files from the drive to my computer when my computer went to sleep (didn't run out of power, just went to standby mode). Turned computer back on and now it won't recognize the drive.
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yes yes yes, I warn people about WD drives on this link:
Your dead external hard drive is likely fine! Great hope for your 'faulty' external HD
theReKleiner wrote:
What now?
Only option is to buy the SAME exact HD and swap controller boards, or pay someone a LOT more $$$ to do the same thing.
its not soldered there, its just a controller/ SATA "one piece"
They do that to save 50 cents in mfg. costs.
I mention your "issue" in that link. Which is why you do NOT buy WD ext. HD.
they make the controller board and SATA card one piece.
CURRENT MFG. THAT HAVE controller board and SATA cards as one piece are : WD USB drives, and Toshiba USB Canvio
However Toshiba didnt USED to do that, but they started doing it at the end of 2013.
avoid those 2.
To avoid that nonsense, buy Hitachi drives in USB.
Or, the best option:
Save money and invest in a bare hard drive backup and redundancy plan
Its cheaper
less fuss
more reiable, removes the nasty failure point of SATA card interfaces.
takes up lot less space.
Bare hard drives and docks. The most reliable and cheapest method of hard drive data storage, archives, and redundancies
The best method for your data archives and redundancies, which is also the least expensive, the most reliable, and the most compact option is the purchase of naked hard drives and at least one USB 3.0 HD dock ($40 roughly).
While regarding Time Machine and your Macbook or desktop, your primary backup is best saved to a conventional USB (or Firewire / thunderbolt) hard drive inside an enclosure, the most important part of your data protection begins after your 1st / primary Time Machine / backup; and these are your secondary (most important) data storage devices, archives and their redundancies.
However bare hard drives and docks (below) also work perfectly as a Time Machine backup, this is for home use, since the docking station is certainly not very portable as a notebook Time Machine backup device should be; nor should bare HD be packed around with a notebook, rather remain at home or office.
Six terabytes of 2.5" HD pictured below in a very compact space.
Bare hard drives and docks have the lowest cost, the highest reliability, and take up the smallest storage space
Drawbacks:
1. Care and knowledge in general handling of naked hard drives (how not to shock a bare HD, and how to hold them properly). Not a genuine drawback.
Advantages:
1. By far the least expensive method of mass HD storage on a personal basis. Highest quality naked HD can be purchased in bulk very cheap.
2. Eliminates the horrible failure point of SATA bridges and interfaces between external drives and the computer.
3. Per square foot you can store more terabytes of data this way than any other.
4. Fast, easy, no fuss and most simplex method of data storage on hard drives.

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If printing wirelessly check your printer sharing settings - System Preferences/Sharing
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Hi @petersaaron , and welcome to the HP Forums!
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Please click “Accept as Solution " if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks" for helping!
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Triple-click anywhere in the line below on this page to select it:
{ diskutil list; echo; diskutil cs list; } | open -ef
Copy the selected text to the Clipboard by pressing the key combination command-C.
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window by pressing the key combination command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.
Wait for a new line ending in a dollar sign (“$”) to appear.
A TextEdit window will open with the output of the command. If the command produced no output, the window will be empty. Post the contents of the TextEdit window (not the Terminal window), if any — the text, please, not a screenshot. The title of the window doesn't matter, and you don't need to post that.
If any personal information appears in the output, anonymize before posting, but don’t remove the context.

My macbook pro won't recognize network printer

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