0x6100004a is the error I keep getting as well.

[Mrs_V]

I keep getting this error message as well. i did get the carriage to move and I removed the print cartridges as it was sliding across. However, it says i did not shut it down properly and I have a paper jam (which I do not).  What is going on with this printer? How do I reset it outside of unplugging and waiting two minutes and pressing the power button for a minute?

[Echo_Lake]

@Mrs_V

Thank you for posting on the HP Support Community.

Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

• Did you make any changes to your printer? 
• What is the product number of your device? Use this link to find it: http://support.hp.com/us-en/document/c03754824
• Have you tried the above-suggested troubleshooting steps?

Keep me posted for further assistance.

[Mrs_V]

The only thing I did differently was send a document to print through the printer's email address.  After that, my printer was history. I could not print again. 

I followed all troubleshooting instructions provided to get it to restart, but nothing worked. It is an HP Office Jet Pro 6968.

[Echo_Lake]

@Mrs_V

Thank you for posting back. 

This sounds like hardware related issue with Printer. Please reach out to HP Support in your region regarding the service options for your printer. HP Support can be reached by clicking on the following link:  www.hp.com/contacthp/             
 

Hope this helps!              
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