Question No video when connecting laptop to tv with HDMI

Apr 17, 2025
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I am trying to connect my laptop (Lenovo Thinkpad E330) to my LG TV (32LD450N) with a HDMI cable (High Speed with Ethernet). The desktop is mirrored to the tv screen, but as soon as I try to start a video within a browser (Firefox) I get a black screen with "no signal". Both the computer and the TV are, of course, old (more than 10 years, I think). Is there anything I can do to get the videos showing? Could the problem be in the settings or in the cable, or is the system simply too old to handle this?