My computer monitor dies from time to time.?

My monitor won t boot with its 12V power adapter. All that happens is the power button turns on for barely a second. But when i use my other screen s adapter which has 18V, it boots. I use it as a defibrillator, then switch back to the 12V and it works fine for a while til I have to do it again. Does anyone know... show more My monitor won t boot with its 12V power adapter. All that happens is the power button turns on for barely a second.
But when i use my other screen s adapter which has 18V, it boots. I use it as a defibrillator, then switch back to the 12V and it works fine for a while til I have to do it again.

Does anyone know what might cause this? Thanks
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