error code OX83C0002B NOS_LOADER_APP

[heejung]

The product is HP ENVY 4520. The error code is "error code OX83C0002B NOS_LOADER_APP".

I can't fix it and can't find any post about it. Need help despirately, PLEASE!!!

[zoey7886]

@heejung, Welcome to the HP Support Community!  

Thanks for reaching out about your query regarding Error Code OX83C0002B NOS_LOADER_APP on HP ENVY 4520! 

We're thrilled to have the opportunity to assist you and provide a solution.  

The error code OX83C0002B NOS_LOADER_APP on your HP ENVY 4520 printer indicates a critical error. Here are steps you can follow to try to resolve it:

1. Reset the Printer

Performing a reset on your printer can often clear out temporary errors.

1. Turn the printer on.
2. Disconnect the power cord from the printer while it is still on.
3. Unplug the power cord from the power source.
4. Wait for 60 seconds.
5. Plug the power cord back into the power source and to the printer.
6. Turn the printer back on.

2. Update the Printer Firmware

Outdated firmware might cause communication errors. Update your printer to the latest firmware version.

1. Ensure the printer is properly connected to the computer.
2. Visit the HP Support website.
3. Search for your specific printer model (HP ENVY 4520).
4. Download and install any available firmware updates.

3. Reinstall the Printer Software

Corrupted printer software can cause communication issues with the printer.

1. Uninstall the printer software from your computer.
2. Restart your computer.
3. Visit 123.hp.com to download and reinstall the latest printer software.

4. Use the Diagnose & Fix Tool

The HP Smart app includes a Diagnose & Fix tool which can help resolve many printer issues.

1. Download the HP Smart app from the Microsoft Store for Windows or the Mac App Store for macOS.
2. Open the HP Smart app.
3. Select the wrench icon or printer status, then choose Diagnose & Fix.
4. Follow the on-screen prompts to diagnose and fix the issue.  

Hope this helps! 

Take care, and have an amazing day!  

Did we resolve the issue? If yes, Please consider marking this post as "Accepted Solution" and click "Yes" to give us a helpful vote - your feedback keeps us going!  

Regards,