HDMI sometimes working, sometimes not working

[coen99]

Hello,

I have the Asrock Z68 ITX board. Installed Windows 7 x64. It's connected to a new Samsung TV via HDMI.
I'm using the Intel onCPU graphics, NO seperate graphics card installed.

When I put it to sleep (S3) and wake it up, sometimes the screen remains black (my TV senses a cable but there is no picture).
I tried:
1. turn the PC off and on (via the power button) -> no result
2. Pull the plug, wait 5 minutes, than plug it in and power on-> no result
3. Other HDMI cables and ports -> no result
4. Check BIOS (beta) updates -> latest installed
5. Turn it off, wait at least a few hours hour -> sometimes working!

UPDATE : Testing at the moment:
1. Reset BIOS to default -> in testing fase
2. Took motherboard outside case to rule out any i/o shield issues

The strange thing is:
1. When it's on it seems to be working correct, however now and than the movieplayer changes resolution.
2. Waking up is working fine 50% of the time, and not working (black screen) also 50%.

Any Ideas / advice?

[MarkJohnson]

Re: HDMI sometimes working, sometimes not working

I ran into this problem on a different motherboard. I ended up just disabling sleep mode.

I found if I plugged in all the video ports I could then switched inputs on the monitor, sometimes it would come on. I mainly had a huge problem with HDMI on boot not working, but once windows loaded drivers, then it would come on.

I updated the BIOS and things started working properly, so make sure you have the latest and load system defaults first thing after flash.

luck
-=Mark=-