A laptop works via HDMI but still intermittent Updated video card drivers with latest version Only seems just to work perfectly with VGA + audio cable Tested with different HDMI cables both at the machine side and with the one through the ceiling which is 10m BIOS to latest version, some machines work on HDMI-HDMI some don't Teacher computers are HP Pro One 440 G4 23.8-in AiO. So far the team onsite has done the following troubleshooting steps but it still randomly stops working. When switching back to VGA and an audio cable everything starts to work again. We've recently had our AV breakouts and wiring updated to HDMI by an AV company and the output drops when using HDMI-HDMI connections and HDMI-DisplayPort via a display port adapter. I'm looking for some help/suggestions with regards to an issue we are having with the secondary output to the projector, which suddenly loses signal at random times during Lessons.
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