I've got a all-in-one printer of HP LaserJet M1120 MFP. When I switch it on the screen shows "Scanner Error 20". And I cannot use the scan function. It can print when connected to computer. I've rea

Hi,
Follow these steps to scan using HP software:Step one: Load the item to be scanned

1. Make sure that the product is connected to the computer.
2. Turn on the product.
3. Load the item in the document feeder tray or on the scanner glass

Tip

Load the following items in the document feeder tray :

• Single items
• Items that are not easily damaged
• Multipage, single sided items that you want to scan into one file

Load the following items on the scanner glass :

• Single items
• Items that are easily damaged, such as old documents and photos
• Multipage, double sided items that you want to scan into one file

• Option one: Document feeder tray
  1. Place the item into the document feeder tray. The printed side faces up and the top edge goes into the tray first.
  2. Adjust the width guides to fit the item.
• Option two: Scanner glass
  1. Open the scanner lid.
  2. Place the item with the print side down on the scanner glass. For the correct position, see the engraved guide near the corner of the glass.
  3. Close the scanner lid.

Step two: Scan the item Use one of the following methods to open the HP scan window:

• Double-click the HP scan icon ( ) on the WindowsI've got a all-in-one printer of HP LaserJet M1120 - note.png. NOTE:If you have more thI've got a all-in-one printer of HP LaserJet M1120 - c02436443.gifduct installed, double-click the HP scan icon ( ) for the product you are scanning with.
• Click Start ( ), click All ProgramsHP folder, click the name of your HP product, and then click HP Scan .

Click the scanI've got a all-in-one printer of HP LaserJet M1120 - c02448891.gifhe item you are scanning. NOTE:Depending on your HP product, you might not have all the following scan optioI've got a all-in-one printer of HP LaserJet M1120 - c02448892.gif

Save as PDF Use this setting to scan text documents that are not editable. Use the Save as Editable Text (OCR) option to scan text that you can edit.

Save as JPEG Use this setting to scan pictures and images.
Hope this information will be helpful.
Let me know.
Regard