Here is a picture:
Well, storing an electronic device on a huge magnet is rarely a good idea.
If it has a mechanical hard drive and the bass from the speaker turns up properly, it is definitely harmful.
If it runs at full throttle, the booster vibrates and if you have an HDD, it guarantees early death.
No, nothing happens. Although there are vibrations from the BOX, this has no effect on your laptop.
If there's a magnetic hard disk in it: Yes, the vibrations are poison for it, it will say goodbye pretty quickly.
If there's only one SSD in it, the vibrations do not do the contacts in the notebook (cable connections, solder pads) any good, and the magnetic fields may cause changes in data and crashes.