I suspect that my AMD Ryzen 5 3600 has died.
I have all new parts: B450 Tomahawk MB, Corsair Vengeance 16 GB (2 x 8 GB) DDR4 3200 MHz RAM and MSI RADEON RX 570 ARMOR 8G GPU. The system was working ok ~3 months ago newly built. It then started to occasionally and then more often drop screen signal, till eventually there was no signal, just a blank screen on boot up (I've tried two different screens/monitors, buth working off other systems). Fans go round and MB lights up.
EVGA 600W PSU voltage is all good (checked all connectors with V meter), GPU removed (to test without), tried new replacement motherboard from supplier, CPU LED lights up, but still no screen via motherboard HDMI. At a loss!
I mainly use my PC for 4K video editing - no overclocking attempted. Thanks.
