Hi all, so I’ve come up against a rather frustrating issue and I’m running out of ideas. Last week I put together a new PC with a spec as follows: Ryzen 3200g Gigabyte B450-I Aorus Pro Wifi 16GB Corsair LPX 3000MHz EVGA 450W GM SFX PSU Crucial MX500 SSD I had to update the bios with a borrowed 2200g but everything went together as expected. I dropped in my old GTX 1050 and it was all working flawlessly for the past week. I bought a used RX570 on eBay, vaguely aware that it may have been used for mining and require a vbios flash, but the card arrived and seemed to be in very good condition. So I removed the Nvidia drivers with DDU in safe mode, installed the RX570 and it booted fine. On installation everything seemed to check out in GPU-Z and the bios version seemed to match stock ones I found online. I’m not sure if this is still the case with a modified bios? I then installed the Radeon drivers, rebooted and got a code 43 error in device manager which I understand is usually driver related? So I rebooted again to see if that fixed anything to no avail. I then thought I’d try removing all graphics drivers with DDU and start again but as it restarted into safe mode it displayed the prompt to press 4 but I was distracted by something else and it seemed to time out into a black screen (I’m not sure if this is normal? I’ve never left it at that screen before.) Then the RGB lights on the motherboard went out, but the fans were still spinning, which I thought was strange. I tried to shut down the PC to boot it again but it wouldn’t respond to anything, not even a long press of the power button! I left it for a long while but eventually had to remove power. When I tried to boot again, the fans spin but there are no lights, no display, no post, and seemingly no power to the keyboard to try and enter bios. I tried removing the graphics card and getting output straight from the motherboard but nothing there either, or with my old graphics card. So far I’ve also tried to boot with the bare minimum hardware, tried to clear the CMOS with the jumper although I have no way to know if that was successful. I’ve alternated the RAM sticks, disconnected the SSD and all extraneous power cables from the PSU, disconnected the front panel IO and all USB devices and still nothing... In terms of the hardware installation I’m pretty sure I did everything by the book. I have been building PCs for a while now, and I tinker with other electronics so I’m mindful of ESD and such. I put my GTX 1050 back in my old PC and that still works fine (but again, the same card doesn’t display anything in the new one...) so I have that for now, but as it’s a SFF office model with a 3rd gen i5 that’s the only part I can swap between the two to test. I know the monitor is good, and the cables (I tried both HDMI and Displayport) and the GTX 1050, but that’s about it at the moment. So if anybody has any suggestions for things I can try, I would be most grateful to hear them!