[SOLVED] New build intermittent HDMI Signal loss

Jun 10, 2020
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Hi!

After finally making the jump to a 4k TV I've just put together the following HTPC as a replacement for my old box:

CPU
: AMD Ryzen 3 3200G
Motherboard: ASRock Fatal1ty B450 Gaming-ITX
Memory: Crucial Ballistix BL2K8G24C16U4B 2400 MHz, DDR4 (8GB x2)
PSU: AeroCool Integrator 400W Power Supply
O/S: Windows 10 (with Kodi as my HTPC software)

Obviously there's some hard drives and a case, but they're not likely relevant to the issue I'm having.

I went with this particular setup because the Motherboard supports HDMI 2.0 directly from the mainboard and so should not need a graphics card to run 4k content. The problem I'm having is that when watching content or even just tooling around in Windows the HDMI connection from the mobo intermittently drops out. It goes for a few seconds, the tv goes black, and then the signal comes back. Not ideal!

Yesterday I took the GTX1070 out of my gaming rig and put it in my HTPC. I've been running movies solidly on the HTPC since then and haven't seen a single signal drop-out (so far, I'm still testing). I had at least one signal drop per movie (sometimes multiple) before adding the graphics card and zero since. So it looks like some issue with the mainboard's ability to put out a signal. I even made sure to put the HTPC back in the same place to make sure it's not some kind of locational interference messing with the HDMI signal on the cable.

I'm not sure if it's not enough power from the PSU (seems unlikely since the 1070 would only add to that power draw). Maybe the CPU and onboard gfx don't have the grunt to decode H265 and push the signal? I've not seen any other issues when running purely on the mainboard graphics - audio is in sync and picture quality is stunning. Could it be something else? The graphics card drivers are up-to-date (something I haven't even bothered to do with the 1070 since it's only in the box temporarily) as is the BIOS so I'm probably ruling out software.

Anyone got any thoughts on what the issue here is? I can buy a graphics card to put in the thing. But obviously I'd prefer not to, since I shouldn't really need it and if I'm honest if I was going to be relying on a GPU I might've spent (a little) less on the mainboard/cpu combination to offset that.
 
Solution
In case anyone else runs into the same issue, I think I've solved it. It was your comment on the BIOS that got me thinking Lutfij. There's an unusually specific link on the ASRock Fatal1ty B450 support page to a particular set of graphics drivers. I'm not sure were I picked up my graphics card drivers from, but I may have just decided without really thinking about it that "latest drivers are always best" because I had a later version installed. I removed those drivers and installed that specific version and it seems to have solved the problem (so far anyway - not had another drop-out yet).

Thanks for your help :)
Welcome to the forums, newcomer!

FYI, you took a big gamble dropping a power hungry GPU(compared to your APU) while on that 400W unit. You could've ended up with a dead PSU or worse a fried GPU.

Can you check and see what BIOS version you're currently on for your motherboard? If you have updates pending, please update them. Is this the board you're referring to? BIOS version 3.4 should be your cut off point.
 
Welcome to the forums, newcomer!

FYI, you took a big gamble dropping a power hungry GPU(compared to your APU) while on that 400W unit. You could've ended up with a dead PSU or worse a fried GPU.

Can you check and see what BIOS version you're currently on for your motherboard? If you have updates pending, please update them. Is this the board you're referring to? BIOS version 3.4 should be your cut off point.

You know I didn't even stop to think about that, but it's a really good point. I've pulled the 1070 from the htpc. I've probably learned about as much as I can from it anyway.

That is the motherboard, but the latest BIOS version is 3.70 (https://www.asrock.com/mb/AMD/Fatal1ty B450 Gaming-ITXac/#BIOS ) and that's the version my board shipped with.
 
In case anyone else runs into the same issue, I think I've solved it. It was your comment on the BIOS that got me thinking Lutfij. There's an unusually specific link on the ASRock Fatal1ty B450 support page to a particular set of graphics drivers. I'm not sure were I picked up my graphics card drivers from, but I may have just decided without really thinking about it that "latest drivers are always best" because I had a later version installed. I removed those drivers and installed that specific version and it seems to have solved the problem (so far anyway - not had another drop-out yet).

Thanks for your help :)
 
Solution