Black screen with no bios

[Corey3594]

After letting my computer set for about a year unplugged till I could get around getting a rma on my power supply well now I am getting error code 02, 94, and b2 and getting black screen only able getting into BIOS once. Also get white VGA light on all error codes and yellow green boot light with white vga light on error code 02. I have tried 2 different monitors, different hdmi and display port cables, different pcie slots, running no graphics card, using my old ryzen 5 1600 and x370 asus motherboard (getting same lights), unplugged all usb cables, different sata cable for boot drive, different sata ports on motherboard and updating bios. Only thing I haven't tried is a different graphics card as I don't have another one, different boot drive as I dont have another desktop and only a laptop (bought a internal hard drive to usb adapter) and reinstalling windows 10 and/or graphics driver.