Satellite M40x will not boot up after CPU upgrade test

I have an M40x Laptop. I took the CPU out of it to replace it with another to test the computer booted up fine so I shut down and took it out and put it's original CPU back in, and it would not boot. Now it will not boot up at all with either of the CPU's all. When I turn on the power all I get is a white screen for a few seconds and the laptop shuts itself back down. Both the CPU's are good because I have since tested them in other computers to make sure that was not the problem.
Anyone have any ideas on what is causing this??

Im not surprised.
As far as I know Toshiba does not support any CPU upgrades and it's not advisable to do something like that.
Its a fact that the CPU replacement on the notebooks is not easy and mostly not recommended.
The processors used in portables are connected to the system board using a process called TCP (Tape Carrier Package). This is a permanent connection method and is used in the interests of miniaturization and heat dissipation.
Did you assign the new heat paste? Its necessary and important if you want to connect the CPU again.
So possibly this is a reason for the no booting.
I think more details you will get from the service guys in your country

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I do not really understand... Did you made a backup before restore to factory settings? And did you copy all backup files to an external device? If not, the data is gone!
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