Check if the HP Envy 5540 driver software of the printer is installed successfully. Also, verify the driver software is full-featured and suits the OS of your computer or laptop. Clear all the unwanted and expired software on your system. Reset the printer to its default settings. Download the HP Print and Scan Doctor application. Run and open the app. Click on the Start button in the welcome screen.
Tap Next and pursue the Finding and Fixing Problems screen. Check the scanning issue under the scanner bar functionality. Try to connect your computer and computer directly without using any hub. Check the warranty status of the printer in the manual of the printer provided in the printer box and service your printer. Or, the manufacturer website. Clean the scanner glass or the document feeder to get rid of Fingerprints, smudges and more. Clean the scanner glass using a lint-free cloth with a glass cleaner or distilled water. If the problem continues, follow the upcoming points. Unplug the power cable with the printer turns on.
Wait for a while and reconnect the cable. If 123.hp.com/envy5540 printer does not power on automatically, turn on the printer by pressing its power button. Change the scan configurations using the HP Printer Assistant and HP Solution Center on your Windows computer. For Mac devices, use HP Easy Scan or HP Scan software. HP Easy Scan application is suitable for Mac OS X 10.9 and later versions. For Mac OS X 10.11 and earlier versions use HP Scan application.