[raidflex]

Hi all,
I'm new to this forum, but this thread was helpful to me when looking for help with building a new HTPC. I just wanted to give a heads up to anyone looking to use an ASRock J4205 board (or J3455) for an HTPC - if you are trying to connect via HDMI to a newer Samsung 4k HD TV, you may have issues with the HDMI connection. I'm running Win 10 - haven't tried Linux since I need Windows on this PC. Not sure if any other TVs have this issue, but there's a thread on the ASRock forum about it here:

http://forum.asrock.com/forum_posts.asp?...dmi-output

I just bought this board last week, and am running it in a Coolermaster 110 mini-ITX case, and couldn't get HDMI to work with my new Samsung 4k TV I bought 2 weeks ago. After reading the ASRock thread linked above, I was able to get it sort of working by unplugging HDMI, powering on the PC with it unplugged for long enough to get to the Windows 10 login. Then I plugged in the HDMI and it was able to go full 4k resolution at 60hz for the HTPC. However, as soon as I'd reboot or I'd turn off the TV for a while, the HDMI connection would be lost, and I'd need to reboot and repeat the process with the cable unplugged. This is not acceptable, since the HTPC needs to be wife/kid friendly, and having to reboot the computer each time they want to use it is not a viable solution. I did upgrade the BIOS on the board to the latest Jan 2017 version too, but it didn't help.

I ended up using a DVI to HDMI cable instead, to run video to the TV from DVI, and used the optical audio out on the J4205 board to my older Yamaha receiver for audio. I was able to get 3840x2160 @30hz resolution through the DVI, but wasn't happy with the resulting video (slightly jerky), so I just scaled back to 1080p @ 60hz and let the TV upscale it for me. The resulting picture is pretty great (compared to my 10 yr old Sony 720p TV I upgraded from), so I'll stick with this for now until more 4k content is available and all the bugs are worked out of these setups, then I'll probably upgrade the board to something better. There was also a slight issue with audio not syncing to the video since they are not running through the same cable, so I went into Kodi (using v17 RC3) and put a .1 second delay on audio playback and it's not annoyingly out of sync anymore.

Just wanted to make people aware, so if they have a newer Samsung TV they might want to avoid the ASrock boards for now. It will still work pretty well with DVI at 1080p and I do get HEVC HW decoding now, which my old HTPC couldn't do, but full 4k HDMI is super buggy with Samsung TVs and the ASRock boards.

I have a Samsung JS8500 (2015) TV and do not have any issues on Libreelec. This may be an issue with Windows 10 I suspect, you may need to create an EDID file and install this on WIndows 10 for your TV.

Try this link, it may help even though its for loss of audio.

http://forum.kodi.tv/showthread.php?tid=251833