I buy a RX 580 and a new monitor Samsung 144Hz freeSync and when I turn on pc motherboard vga error led turn on and don't display bios or anything on screen. I try 2 different moniotrs and my TV also and the problem dosen't appear. I install windows and drivers connected to another monitor and i try again samsung monitor. vga led still turn on bios and windows charge dosen't appear but when windows turn on the signal is display and work without problem iven the vga led is turned on