Changed CPU and now I get a black screen

Solution


What board and CPU?
Sometimes a BIOS update may be required.

List of components would be helpful.
Did you connected CPU power cable (4/8 pin)? and all other cables, RAM sticks etc? If yes, go back to old CPU - if it works, that means either your new CPU is faulty or not supported; if the old one no longer works too then possibly you damaged motherboard during swap (if Intel CPU, then make sure to look for bent pins in CPU socket).