Wherever there are contacts there may be a failure. The 'acid' content of smoke may also eat away at circuit boards and components. Studies are still in progress on this. It is recommended that your hard drive be replaced once a year to prevent data loss from smoke. At a minimum, at least once every two years.
Smoke is carried throughout a facility by fans, central air conditioning and central heating.
Even when you cannot smell it, enough smoke is present to do damage to your computer equipment.