Mac display turns off?

Hello everyone,
I don't understand why my Mac display turns of automatically when another electronic device is brought near it. The system is still running but the display just goes black and Mac logs the user out. The other day I got off the phone while working and I put the phone on the left side of the Mac just above the speakers and display went black. I pressed the keys but in vain. I removed the phone and put it back in the dock. The display comes back to life with me logged out.
The happened many times after it and before the incident but the thing I observed it, the display turns off when an electronic device is brought near it. The weird thing, it turned off when I put the Mag Safe pin on the speaker noticing that the power is full. Is it due to some kind of interference of the Mag Safe's(other devices) magnetic field with Mac's power ciruits? I also noticed that this happens only when the device in context is on or plugged in. I just want to make sure that thats the reason or my Mac has some problem!!

You should call Apple service number they will surely help you. You should find it in your computer's documentation. Good luck!

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