Everything started yesterday when my computer shut down without a reason. I searched for a problem and find out that my PSU wasn't working so i bought a new one called Corsair CX Series CX450M 450W 80 Plus Bronze. I use M5A78L-M LX3 motherboard and Nvidia Geforce GTX 1050 Ti. So i got everything set up but when i turn the computer on it starts normally but the display doesn't show anything. I had this problem when i bought the computer because my cable from monitor to computer was VGA to VGA so i changed it from HDMI to DVI-I and it worked but now it's not working. Do you have any ideas why it's not working? When computer is on everything seems to be working but not the display. Can be the problem with video card? My monitor is LG with VGA and DVI-D ports