Why not turn on the computer after replacing the CPU?

Motherboard ASUS P8H61-MX, it worked, but lately began to fall off usb ports. Just stop working until you reboot. Turned up cheap i5 processor under the socket, and decided to replace the computer refused to turn on after subs CPU. Gives 4 short beeps. Googled the error system timer. Tried to replace the battery, but it didn't help. Put the old processor is not enabled and no signal at boot, no. Only the coolers are spinning. Again, put a new percent - 4 times beeps. Removed memory and video card, a bulb blew the connectors, put - did not help. Dead motherboard? But why with a new percent, it beeps, and the old just won't turn on?
April 3rd 20 at 18:54
3 answers
April 3rd 20 at 18:56
Motherboard all.
For cleaning outside can disconnect everything except video card (if not integrated), leave one die and the old CPU and try to turn.
And why is it only squeaks with the new percent?) I am now very surprised. - maymie62 commented on April 3rd 20 at 18:59
April 3rd 20 at 18:58
April 3rd 20 at 19:00
Carefully check the legs on the socket, every. Probably bent a couple during installation and removal of percent. You can gently with a needle to return to the place, and in this case everything will be OK.

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