Just bought new DS 732, came out of new show house with slight shell damage. worked okay to start with on normal setting untill near end of cycle (drying). when their were two loud popping noises and a smell of burning. switched everything off , checked as much as i could. has done a few full settings since including four fast cycles and everythings been fine. i know it does not sound good but it seems a shame to scrap it as it has worked perfectly since. any ideas.