HP3750 does not print only one color (magenta/red). Already tried all assistence suggestion.

[ACRIDEMIS81]

I tried with cleaning checks, I changed the cartridge with new one (always original ones), but it doesn't change: no red colour printed

[sandytechy20]

@ACRIDEMIS81

Welcome to the HP support community.

I understand that you are getting print quality issues, follow the below steps to fix the issue.

If you have tried all the steps mentioned in this HP document:- Click here

And if the issue still persists, this could be a hardware issue.

I request you to talk to HP support.

They might have multiple options to help you with this.

1. Click on this link - https://support.hp.com/us-en/contact-hp?openCLC=true
2. Select the country.
3. Enter the serial of your device.
4. Select the country from the drop-down.
5. Click on "Show Options".
6. Fill the web-form. A case number and phone number will now populate for you.

Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.