How do I clean the LCD screen?
To clean the LCD panel, turn off the monitor and unplug it from the back. Use a soft, lint-free cloth to gently wipe the screen surface; for tougher stains, use a damp cloth with a solution of water and isopropyl alcohol sprayed onto the cloth (not directly on the screen). Avoid using cleaners containing benzene or thinner as these can damage the monitor.
From the official HP Probook 4540s Notebook PC manual, page 5
Have a follow-up question?
Answers from the official manual.
Common questions