If your monitor or an HDMI connection is humming, you should rule out a fault. ... Connect the “problem device” to a different socket as a test and disconnect all other connected loads.

It's frustrating to plug an HDMI cable into your TV and get no picture. Luckily, most fixes are simple and inexpensive.

Set Up and Test: Allow the TV to reboot, complete the initial setup, and then test the HDMI connection again. Method 8. Contact Samsung Support or a Professional Technician.