Windows 10: Monitor not showing up with HDMI chord

Hi,I am having a weird issue. For the first two days I used my brand new computer, both my wireless mouse With USB dongle and the external monitor worked. Then I woke it up from sleep this morning and the wireless mouse failed to work. I restarted it and updated the computer, and now the mouse works but the monitor is not being registered via an HDMI cord. Any ideas why restarting/updating the computer would cause the HDMI port to stop working it has failed to work on two different monitors.I'm running Windows 10 on a latitude 5420.

:)

 

HDMI Windows 10 not showing in playback devices

Hi Inderpal,

For better assistance, we'd like to know the following:

• When did you start encountering the issue?
• Have you tried using another monitor on the same computer?

We're looking forward to your reply.

 

HDMI no output after update to FullHD monitors

Hello

My system:

• AMD Graphics Card
  • GPU : 912-V308-001 (or) R9 290X GAMING 4G
• Desktop mid tower
• Operating System Windows 10 64bit Update 1709
• Video Driver version installed AMD Radeon Adrenalin Edition 17.12.2 Drivers
• Display Devices that does not work with HDMI :
  • BenQ - GL2450HM 24.0" 1920x1080 60Hz
  • AOC M2470SWH 23.6" 1920x1080 60Hz
  • Philips 243V7QDAB/00 24'' 1920x1080 60Hz
  • AOC - G2460VQ6 24.0" 1920x1080 75Hz Monitor (currently using with Display port, does not work with HDMI)
    • The HDMI port works with 4k tv so I know it is functional.
• Motherboard Asus - SABERTOOTH Z97 MARK2 ATX LGA1150 BIOS Version 2702
• CPU Core i5-4690K
• Power Supply Unit Corsair - Builder 750W CX750 or CP-9020015-EU
• RAM 16GB

Issue:

• One morning after regular updates my graphics card stopped sending signals to HDMI monitors that are bellow the resolution of 4k. The monitors, just shows no signal, when you uninstall the drivers sometimes, like once in 4 times it will catch
  the monitor, but if you restart the PC you will again get no signal. The monitors works perfectly with my laptop on HDMI. 3 Of the monitors are fresh from the box. The HDMI port works perfectly with my 4k TV. Tried switching 7 HDMI cables total. Reinstalled
  windows twice, video drivers several times. Currently using a display port for one of the monitors.

 

Why exactly is ATi considered be better at HDMI?

I plug my HDMI cable into the card, then into my TV. Those are the steps that I have to do. All the steps you list make absolutely no sense to me.