HP LaserJet Pro MFP M28a

[Fox65]

copying cuts all settings on a4. scanning is normal

[sandytechy20]

@Fox65

Welcome to HP forums, I see that you are getting issues while doing copy on the printer.

• What is happening while doing a copy?
• Did you check if that prints fine from the computer?

Meanwhile:

Print a cleaning page 

1. Search Windows for HP, and then click your printer name from the list of results.

   HP Printer Assistant opens.

2. Click Print, and then click HP Device Toolbox.

3. Click the System tab, and then click Service.

4. In the Cleaning Mode section, click Start.

Reply with the requested information for further assistance.

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

Cheers.

[Fox65]

when copying, the scanner lamp stops at 11 (letter) when scanning the scanner lamp reaches a4

[sandytechy20]

@Fox65

Update the printer firmware

Refer this HP document the steps to update the firmware:- Click here

Cheers.

[Fox65]

firmware datecode 20180809.when copying the scanner lamp reaches the mark 11(letter) and not a4

[sandytechy20]

@Fox65

This seems to 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 - www.hp.com/contacthp/

2) Click on "Continue as guest".

3) Enter the serial of your device.

4) Select the country from the drop-down.

5) Click on "Show Options".

Fill the web-form. A case number and phone number will now populate for you.

Cheers.

[Fox65]

thanks but this problem is in five new printers: HalfEyes:

[sandytechy20]

@Fox65

This situation will need some additional support from our internal teams in HP. For that to happen, we will give you additional instructions/information via private message.

Cheers.

[Fox65]

Following the workflow below has resolved the issue:
HP Device Toolbox>Copying tab>Letter replace to A4>Save changes