This article covers the most common causes as to why, randomly, computers in ICT1 don’t have sound. It does not cover all situations but should be use as the first level of fault diagnostics.
What is the most common cause as to why there is no sound on some computers in ICT1? - The most common cause for no sound on computers in ICT1 is students changing the sound settings.
View the attached pdf for first level fault diagnostics.