went black like powerling off and not turning on again
I put the external keyboard to my lenovo thikpad t450 and shotcircuit take place when the laptop it was on power using but it went black like powerling off and not
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@geoffrey28430 There is an emergency reset hole on the bottom of some ThinkPads, the T450 included.
You need to find a thin object like a pen or pin and try to poke the hole.
Refer to this post for a guide to find the reset hole.
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