The ResMed S8 CPAP line of machines were made starting in 2005 and continuing through 2009. The early models had issues with smoking and a crackling sound from where the power cord plugged into the cpap. This was caused from constant pulling on and off the plug which will break loose the internal connections. If you experience this issue with your S8 CPAP, immediately stop using it as it may be a fire hazard. This issue is something we can repair. On later units, this problem was remedied with a more robust input design.
Posted by Advans CPAP Staff on 9/14/2018