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. If the cable is not damaged, check the projector input settings and computer display settings, update graphics card drivers, and inspect your projector HDMI port.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. When your Epson Projector displays a ‘ No Signal’ message when using HDMI as input, first inspect the HDMI cable. In that case, I would recommend getting in touch with Epson’s official support. If the new cable works without a ‘no signal’ error message, then it means your projector HDMI port is faulty. If that does not work as well, test your laptop with another projector or monitor using HDMI. If your projector has multiple HDMI ports, try using the other one. If none of the above methods work, maybe the issue is with your Epson Projector port. Once your graphics card drivers are updated, restart your computer for changes to take effect. Select Search automatically for the driver option. Right-click on your display driver and choose Update Driver. You can open it by typing devmgmt.msc command in Windows Run. To update graphics card drivers in Windows 10 or Windows 11, open Device Manager. Another quick workaround is to update your computer GPU drivers.
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