PC refuses to connect to monitors

GPU: MSI NVIDIA GTX 1660 Ti Ventus XS 6G OC Motherboard: MSI B450 Tomahawk

All I did was take my friends cooler out to replace the dried thermal paste on the CPU and didn't touch anything else.

I booted it back up to test it and now everything turns on but neither the motherboard or GPU will connect to any monitor. The VGA light is on though but everything was working perfectly fine before this.

I already reset the CMOS, used multiple monitors and HDMI cords, moved the GPU to another slot too. The GPU runs fine on any other motherboard I tested it on though.