New build HCPC with SPDIF sound cutting out. Gigabyte 7N400 Pro2 MB AMD 2600+ processor 512 Dual DDR Asus 9600XT Maxtor 160gb HD Liteon DVD and CD drives Realtek AC97 on board sound (optical or coax out) Windows XP home Power DVDxp player Standard black case with 350W PSU Z2 via DVI I thought I had this problem sorted by simply swoping coax cables, but to my dismay and utter frustration the problem has returned. I can watch say about 20 mins of a movie then the sound keeps cutting out though SPDIF coax AND optical connection to my reciever. However playback through headphones is fine. So far I have downloaded all the latest drivers, re-installed PowerDVD, and checked all internal connections. Spent hours reading various threads here and elsewhere and now I'm stuck. Any ideas would be welcome, Thanks.