Intel Core i5-10600K 4.1 GHz 6-Core Processor
Lets back up a bit.
What motherboard MAG Z490 their several different.
Remove the drives, remove the USB thumb drive, Known working USB keyboard plugged into a USB 2.0 port, no video card is stated so I would think built in graphics using a known good cable not using a adapter.
24 pin connector connected, at least the 8 pin CPU connector connected, memory is in the proper slots as per the motherboard manual.
All of the above then press the power button and spam delete.
Still nothing reset CMOS again in the motherboard manual and try again.
EDIT some boards have little LED's or a error code display for CPU, memory, VGA failure, refer to your motherboard manual.
If you...