Printer error paper size mismatch

[PecanPatty]

I keep getting Paper Size Mismatch.  I am using standard 8 1/2 X 11 paper it should be straightforward.

[Raj1788]

@PecanPatty

I suggest you do a Hard Reset on the printer

(1) Turn the printer on, if it is not already on.

(2) Wait until the printer is idle and silent before you continue.

(3) With the printer turned on, disconnect the power cord from the rear of the printer.

(4) Unplug the power cord from the wall outlet.

(5) Wait at least 60 seconds.

(6) Plug the power cord back into the wall outlet.

NOTE: HP recommends connecting the printer power cord directly to the wall outlet.

(7) Reconnect the power cord to the rear of the printer.

(8) Turn on the printer, if it does not automatically turn on.

The printer might go through a warm-up period. The printer lights might flash, and the carriage might move.

Wait until the warm-up period finishes and your printer is idle and silent before you proceed.

Adjust the paper size setting

Check the paper size setting to make sure it matches the paper you want to print.

NOTE: 

Some printers have an option to ignore the error and continue printing. If you choose to ignore the error, the margins on your printout might not be proportional to the edges of the paper.

1. In the program you want to print from, click File, and then click Print.

2. Make sure your printer is in the Name or Printers drop-down list box, and then click Properties, Printer Properties or Preferences.

3. Click the Paper/Quality tab.

4. Click Advanced, if necessary, and then click Paper Size.

   

5. Select the paper size that matches the size and type of paper loaded in the printer tray, and then click OK. If there are no matching paper sizes, select the size from the list that is closest to the size of the paper loaded in the tray.

6. Click OK, and then try to print.

Check the paper source setting

Remove and reload the paper in the input trays, and then check the paper source setting.

1. Remove all the paper from all the printer input trays.

2. Reload the paper, and then adjust the paper width guides so they gently rest against the edge of the paper stack.

3. In the program you want to print from, click File, and then click Print.

4. Make sure your printer is in the Name or Printers drop-down list box, and then click Properties, Printer Properties or Preferences.

5. Click the Paper/Quality tab, and then click Paper Source to select the correct tray.

6. Click OK, and then try to print.

Update the firmware for the printer using this link: https://support.hp.com/in-en/product/hp-envy-5540-all-in-one-printer-series/5447939/document/c029191...

Restart the Printer.

Keep me posted, how it goes!

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Cheers:)