Fatal1ty B450 Gaming-ITX/ac HDMI & DP not working

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Hi,

Have an ITX Fatal1ty B450 with a 3400G (no dedicated GPU) that has been working fine for 9 months, but since yesterday both HDMI and Display Port stopped showing image.

Have tried:
- 4 x different HDMI cables
- 1 x single DP cable
- 3 hdmi ports on 1 x 75" LG TV (that has been its output for the last 5mo) | have confirmed TV ports are working with other devices
- 1 x 28" ASUS monitor, with both hdmi and DP cables (monitor ports also working with other devices)

No image during boot or after. 
I get a black vnc session when no display attached. With a display attached, I can vnc fine and everything else appears to be working correctly (so it does appear to detect the presence of a display).

Display keeps switching every few seconds between a black screen and "no signal detected".

Any help would be appreciated?

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mvitorino Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 20 Sep 2020 Status: Offline Points: 3	Post Options Post Reply Quote mvitorino Report Post Thanks(0) Quote Reply Topic: Fatal1ty B450 Gaming-ITX/ac HDMI & DP not working Posted: 20 Sep 2020 at 7:13pm
	Hi, Have an ITX Fatal1ty B450 with a 3400G (no dedicated GPU) that has been working fine for 9 months, but since yesterday both HDMI and Display Port stopped showing image. Have tried: - 4 x different HDMI cables - 1 x single DP cable - 3 hdmi ports on 1 x 75" LG TV (that has been its output for the last 5mo) \| have confirmed TV ports are working with other devices - 1 x 28" ASUS monitor, with both hdmi and DP cables (monitor ports also working with other devices) No image during boot or after. I get a black vnc session when no display attached. With a display attached, I can vnc fine and everything else appears to be working correctly (so it does appear to detect the presence of a display). Display keeps switching every few seconds between a black screen and "no signal detected". Any help would be appreciated?