Question Why won’t my computer work

[Jmk445]

So I recently case swapped my pc (this is my first time btw) now after all of my time spent watching videos and researching I finally get it done and I turned it on and it had a few issues. My first issue I ran into was no display I then ran into the problem of the keyboard and mouse not getting any power when plugged in. Any ideas how to fix this?

 

[QyInvoLing]

Any image?

 

[Misgar]

Any ideas how to fix this?

Check all the ATX power cables are plugged into the correct locations, i.e. 2 power cables to mobo, PCIe power cable if large GPU fitted, SATA power cables, etc.

Do you have the front panel power switch wired to the correct header on the mobo?

Are you connecting your monitor to the correct port?

If none of these work, remove the motherboard from the new case and check the placement of all metal standoffs. You might have shorted out the underside of the mobo to chassis. If so, watch out for "magic smoke" as the board dies.