ASROCK B450M-HDV-R4 Black Screen

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   Hi,
I have a ASROCK B450M-HDV-R4 motherboard with Ryzen7 2700x ,Gigabyte Radeon Rx 590, Intel 660p, ADATA XPG GAMMIX D30 16GB and Aerocool KCAS 600W.
After I got my setup connected, I plugging my hdmi to rx 590's output and it was all fine. But before I installed any OS, I was looking around in the bios menu out of curiosity. I turned CSM mode to enable from the boot menu because I thought it will make it easier to install windows on my ssd, but after I changed that setting my hdmi display never came back ON.
I tried everything I could think of, I changed csm mode back to disable through the keyboard shortcuts, I performed cmos reset by taking out the cmos battery and discharging through pressing power button. I put jumper on CLRCMOS1 and took out battery at the same time, let it stay like that 20 minutes.
But the result did not change. still black screen when I power up. Both the fans of the gpu and cpu work, my connected mouse/keyboard doesnt light up. 
Sorry if I left some part out, I am pretty frustrated because of trying to boot this new pc up for two days.
Regards, Kadir

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rakidis16 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Jan 2020 Status: Offline Points: 5	Post Options Post Reply Quote rakidis16 Report Post Thanks(0) Quote Reply Topic: ASROCK B450M-HDV-R4 Black Screen Posted: 24 Jan 2020 at 4:27am
	Hi, I have a ASROCK B450M-HDV-R4 motherboard with Ryzen7 2700x ,Gigabyte Radeon Rx 590, Intel 660p, ADATA XPG GAMMIX D30 16GB and Aerocool KCAS 600W. After I got my setup connected, I plugging my hdmi to rx 590's output and it was all fine. But before I installed any OS, I was looking around in the bios menu out of curiosity. I turned CSM mode to enable from the boot menu because I thought it will make it easier to install windows on my ssd, but after I changed that setting my hdmi display never came back ON. I tried everything I could think of, I changed csm mode back to disable through the keyboard shortcuts, I performed cmos reset by taking out the cmos battery and discharging through pressing power button. I put jumper on CLRCMOS1 and took out battery at the same time, let it stay like that 20 minutes. But the result did not change. still black screen when I power up. Both the fans of the gpu and cpu work, my connected mouse/keyboard doesnt light up. Sorry if I left some part out, I am pretty frustrated because of trying to boot this new pc up for two days. Regards, Kadir

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 26118	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 24 Jan 2020 at 10:39pm
	Try pulling the GPU out and clearing CMOS before putting it back in again. Also try a different display output and cable if you can.


rakidis16 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Jan 2020 Status: Offline Points: 5	Post Options Post Reply Quote rakidis16 Report Post Thanks(0) Quote Reply Posted: 25 Jan 2020 at 12:54am
	Unfortunately that didnt work either. I took out the gpu, cleared cmos and then powered up without the gpu, buzzer beeped because there is no graphic manager and then later I put back gpu and powered again, no buzzer, but also no display on monitor still. I tried hdmi-hdmi, dp-dp and dvi-hdmi cables and problem remains. I dont know what else can be done.. :(

rakidis16 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Jan 2020 Status: Offline Points: 5	Post Options Post Reply Quote rakidis16 Report Post Thanks(0) Quote Reply Posted: 25 Jan 2020 at 1:17am
	I put in all displays at once and kept trying like that, then I got display suddenly. I will install my os now and hopefully never mess around with CSM mode again.