Photosmart 7520 - Paper Size Mismatch

[highfell]

I had to change the power supply unit about a year ago and bought a legitmate replacement HP Power supply ( 0957-2304) from Amazon UK.

Ever since then i have been plagued by this Paper Size Mismatch error when printing from my Macbook pro laptop on some settings eg plain paper best. And i have been unable to print using airprint from my Iphone or Ipad because i get the same error message.

Please can you help me. My printer has been rendered close to useless by this situation.

Many thanks 

[Jeet_singh]

Hi @highfell,

Thanks for engaging in HP support Forums! This is a wonderful location to converse with the community, get assistance and find tips! I understand you are getting "Paper size Mismatch error message on the printer. Don't worry as I have a few suggestions which should help you resolve this issue.

To provide you with an accurate solution, I'll need a few more details:

Have you recently made any changes on the printer before the issue started?

Have you tried to perform a reset printing system on Mac?

Are you able to make a copy from the printer?

In the meantime, let's try these steps here: 

Perform a Hard reset on the printer and make sure that the printer is connected directly to the wall outlet and not to the surge protector.

Remove all the ink cartridges and then try to perform a hard reset on the printer.

With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.

Remove USB cable, if present.

Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.

Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord and then plug back the power cord to the printer.

Turn on the printer and wait till warm-up period finishes and the printer is idle.

Now insert the ink cartridges and then try to print a test page and check if it works.

Let’s first try and make a “photocopy” to determine whether the issue is with the printer or not. Place a document on the scanner glass and choose “Copy” option. If the printer is making a good copy, then the printer hardware is fine.

If you are using MAC OS, then try the steps here:

• Click the Apple menu icon, and then click “System Preferences”.
• Click “Printers and Scanner” / “Print and Scan” or “Print and Fax”.
• Right-click the blank space in the Printers list, and then click “Reset printing system”.
• Click “Reset” in the confirmation window.
• Enter an administrator username and password, and then click “OK”.
• Wait until the printing system is reset and no devices show in the Printers list.
• Restart your computer and then go back to System preferences – Printers and scanners.
• Click the “Add button” (+).
• Find, and then select the name of your printer from the printer list, and then click “Add” to add your printer.
• Click “Print Using...” or “Use”, and then select Secure AirPrint or AirPrint. Alternatively, you may select the name of your printer if available in that list.

Please let me know if this resolves the issue, or if you require further assistance!

Eagerly waiting for your response!

I hope you have a good day ahead,

And Feel free to ask your queries as this forum has some of the best people in the world available and ready to help.

Regards,

[highfell]

Thanks 

Thanks for the reply. I have tried restting the printer but I get the same problem. I have attached photos of the error message on the printer and the computer. as explained this problem only started when i purchased a replacement popwer supply and i can onmly assume the printer somehow assumes i am not in the the UK because of the power supply and defaults to a different paper size that A4. This issue seems to affect wireless printing.

[highfell]

To add, i have updated my printer software on the Mac, have reset the printer to default settings, the printer is set to auto-update

[jims1954]

Nothing suggested worked. I have MAC OS and followed directions explicitly. Doesn't work. Now what?

[jims1954]

SO! What now?

[TEJ1602]

@jims1954, Welcome to HP Support Community!

I see that you have paper mismatch issues while printing, let us try steps from the document HP Printers - Paper Mismatch Error (Mac) for help in resolving the issue. 

Hope this helps! Keep me posted. 

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 bottom right to say “Thanks” for helping!