My Envy x360 convertible has stopped working with an external 24” HDMI connected Benq display. It was working fine until 24 December; that evening I disconnected from the external display and used it as a stand alone laptop. When I plugged in the external display again nothing appears on the external.
The external is connected via the USC-C port and an HDMI connector. I have tried swapping and eliminated as a problem the USB C connector, the cable and the display; I have also tried a USB C to VGA connector with the same display and that also does not work. When I plug in the USB – HDMI connector it appears in the devices list.
I have uninstalled and deleted the AMD RX Vega 10 display adaptor driver, rebooted and allowed the laptop to reinstall the driver. I have updated to the latest driver and BIOS. The laptop knows it is connected to the external display because it has installed the device specific monitor driver, visible in the devices list.
When I go into Display settings without the external connected I do not see the Device Identification picture; when I connect the external I see the Device Identification picture but it shows a single screen image with “1 | 2” displayed within the same box (I would expect it to show two boxes, with the two displays identified as 1 and 2 respectively.
The most recent Windows 10 update is dated 20 December, so that hasn’t changed anything.
Device type HP ENVY x360 Convertible 13-ag0xxx Product number 4RE56EA#ABU Windows 10 Home 64-bit Version: 17134.472