UA_400_EB000U0204

[ErdonJusufi]

I just bought new printer HP LaserJet M236dw and its showning this problem to my phone when i try to sign in on HP Smart app: UA_400_EB000U0204

[Max3Aj]

@ErdonJusufi, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 

The error code UA_400_EB000U0204 in the HP Smart app usually indicates a problem connecting to your HP account. 

Please follow these steps, 

Update or Reinstall the HP Smart App

• Go to your App Store (iOS) or Play Store (Android).
• Uninstall HP Smart completely.
• Reinstall it and try signing in again.

Check Your Internet Connection

• Make sure your phone is on a stable Wi-Fi (not mobile data).
• Restart your router if needed.
• Try switching Wi-Fi networks if possible.

Clear App Cache (Android only)

• Go to Settings > Apps > HP Smart > Storage > Clear Cache & Data.
• Then reopen the app and try again.

Use a Different Device or Browser

• Try signing in to HP Smart web or HP account page from a computer or another phone.

Reset Network Settings (Optional)

If nothing else works:

Go to Settings > System > Reset > Reset Network Settings (on your phone).

Note: This will reset all saved Wi-Fi networks.

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support