There was a point where Watney took a portable computer outside and the LCD was instantly destroyed. The assumption being it was permanently destroyed.

But after the HAB accident where it was opened to the extreme cold and near vacuum of the Martian environment, wouldn't the computer screens in the HAB also have been destroyed? But I'm under the impression that he continued to use the computers in the HAB.

Please let me know if I skipped over something or there might be other explanations.

thank you