Your need to check up with CPU to some technical hardware
expert. If your computer is not starting then there is big issue
inside. You should save copy of your important documents in drive
not on desktop. Because if you only saved your documents on desktop
then there is less chances to get back those files. And if you know
better buying a new CPU is very costly. In this case I'd recommend
first to check your SMPs, check is there any problem of power
supply or any damage to it to not. To check with another test
procedure would be, if your PC computer absolutely will not boot
up, a savvy computer owner can remove the hard drive and place it
in a working machine. With most desktop PCs, this is actually a
pretty easy procedure, and it’s a quick way to find out if the hard
drive is damaged beyond repair. If you're finally able to boot up
the hard drive, you may need to use hard disk file recovery
software.
The best hard drive recovery software will allow you to restore
potentially lost files from a damaged hard drive. Once you’re able
to access the old drive, whether from safe mode or installed in a
working machine. After this, you can run the recovery software and
begin copying over those important files. Hope this will help you
out to get your files.