I'll take a guess here. If the computer got cold enough on the inside to cause some condensation of moisture when it was brought inside, that could cause problems when plugging in and powering on if that was done too soon after bringing the computer inside to allow the computer to warm to room temperature on the inside and allow time for any moisture to evaporate.
This problem can be avoided by giving the computer time to warm to room temperature and for any condensed moisture to evaporate BEFORE plugging in and powering on. Warming the computer could be sped up by use of a space heater or hair dryer to blow warm air directly at it.
Whether permanent damage was sustained will be confirmed by whether the computer returns to normal operation after it has had time for any moisture inside to evaporate.