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- HP Community
- Printers
- Printer Wireless, Networking & Internet
- OfficeJetPro 9125e can't find wifi + invalid serial #

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03-02-2025 12:39 PM
My OfficeJetPro 9125e is not connecting to home wifi or working with a cable. Even though I know I am entering the correct serial number the HP automated phone support and website are saying it is invalid. I was able to log a case number but don't see a way to follow up on that case.
So I am stuck and would like support. This is a brand new printer and not usable.
03-05-2025 12:50 PM
Hi @davis6120
Welcome to HP Support Community.
Thank you for posting your query, I will be glad to help you.
I'm sorry to hear you're having trouble with your HP OfficeJet Pro 9125e printer, especially since it's a brand new device. Let's work through a few steps to get your printer connected to Wi-Fi and resolve the serial number issue.
Steps to Troubleshoot Wi-Fi Connection:
1. Check for Network Issues
- Make sure that your Wi-Fi network is working properly and that other devices (like phones or laptops) can connect to it without issues.
- Ensure the Wi-Fi is using 2.4 GHz and not 5 GHz if you have a dual-band router. Some printers may have trouble connecting to 5 GHz networks.
- Restart your router to resolve any network glitches.
2. Connect Printer to Wi-Fi Using WPS
If your router supports WPS (Wi-Fi Protected Setup), this is often the easiest way to connect your printer to Wi-Fi without needing to enter the Wi-Fi password.
- On the router: Press the WPS button on your router. The WPS light should blink.
- On the printer: Go to the Control Panel of your printer. Select Wi-Fi settings and choose WPS. The printer will try to automatically connect to the Wi-Fi network via WPS.
- Once connected, the printer’s Wi-Fi light should be solid, indicating a successful connection.
3. Manual Wi-Fi Setup
If WPS is not an option, you can manually enter your Wi-Fi information:
- Go to the Control Panel on your printer.
- Select Setup > Network > Wireless Setup Wizard.
- The printer will search for available Wi-Fi networks. Select your home network from the list.
- Enter your Wi-Fi password carefully.
- Once the printer connects, check for the Wi-Fi symbol on the printer's screen to confirm the connection.
Addressing the Invalid Serial Number Issue:
If you're seeing an invalid serial number error, here are a few things to check:
1. Verify the Serial Number
- The serial number is typically found on the back or bottom of the printer or on the printer’s box. Make sure you’re using the correct one.
- Double-check the characters (e.g., if it’s a 0 or an O, 1 or I) to ensure you're entering it correctly.
2. Reset the Printer
A hard reset might help clear out any errors related to the serial number.
- Turn off the printer and unplug it for about 30 seconds.
- Plug it back in, power it on, and try entering the serial number again
I hope this helps.
Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.
Sneha_01- HP support