A printer error has occurred. See your documentation.

Hi,

the approximate meaning is that the software in your printer has attempted to perform an unexpected operation. So, if you're attempting to use a certain function on your printer, please restart and try once more. Otherwise, you might need to consult the printer manual to help troubleshoot the code.

Thank you.

HP Smart Tank 450 Printers - 'E9' Error (Ink System ...

https://support.hp.com > sg-en > document

An E9 error occurs when the printer detects that ink system maintenance is required. An Ink System Maintenance page prints containing instructions to open and close the printhead access door to resolve the error.

Videos as well

https://www.google.com/search?q=HP+Printer+Error+E9

..

Which printer? Try looking for user manual (documentation) here: Download Free Manuals

From Canon:

2700 Description
This error occurred due to one of the following reasons -

• An error occurred while copying.
• The document is still in the ADF.
• An error occurred while scanning and the document is still in the ADF.

Resolution

1. When copying, press the [OK] button to dismiss the error, and try to copy again.
2. If the document is still in the ADF, press the [OK] button to feed out the document.
3. When scanning, press the [Stop] button to cancel, and then try scanning again.

If the above solution has not resolved your error, please contact your nearest Canon authorised service facility.

a printer error has occurred turn off the printer and turn it on again see your documentation

A printer error has occurred see your printer documentation

Is it show general error?
Your printer's problem is in a sensor that is situated the opsition of the printer head. Try to clean it. Totaly deassemble the head carriar and then see it's opposite. there is 2 too little hole jast like a little incect eyes. These is the culpit. Clean it with soft tissue or soft painting brush.
I think you may relive from your printer problem.
Thank you

This means see the document you are printing or install it again

error 49.4c02:

Printer Error 49.XXXX - A critical firmware error has occurred. - - Turn the printer OFF then ON. If the error continues, then contact HP Technical Support.

Generally speaking, this error will occur if you are using an outdated firmware build.

Don

Hi

Open the glass cover on top of printer, check a switch for lock and unlock on left or right hand side of the printer. toggle it to unlock position, turn it back on and check if there are errors still.

Keep me posted.