Hi I have Asrock B75M-GL R2.0 as a os installed windows server 2012 r2 essentials uefi installed. I turned on the server this morning and the board went into bootloop mode, I plugged it into a monitor cos it runs headless and when I turned it on again everything started but a black screen remains, took out my ram and replaced it to see if there is the problem and nothing I then took out the bios battery to reset it and after that everything worked fine . anyone has a idea what could have cozed the behavior ?