Audio Disappears switching channels. Have to stop/restart TV. (1 Viewer)

[GiuseppeC]

TV-Server Version: 1.0 RC3
MediaPortal Version: 1.0 RC3
MediaPortal Skin: Default
Windows Version: Windows XP SP3
CPU Type: Athlon 64 3000+
HDD: 2 x SATA 200GB 2xPATA 160GB
Memory: 1GB Kingstone DDR 400 single module
Motherboard: Gigabyte K8NS-Pro
Video Card: Sapphire Radeon XT 2600 HD
Video Card Driver: ATI Catalyst 8.9
Sound Card: Onboard Realtek AC97
Sound Card AC3:
Sound Card Driver: 5.10.0.6160 18/08/2006
1. TV Card: Hauppauge Nova-S plus
1. TV Card Type: DVB-S
1. TV Card Driver: 2.122.26109.0 18/04/2008
2. TV Card: hauppauge HVR 1300
2. TV Card Type: Hybrid Analog DVB-T
2. TV Card Driver: 2.122.26109.0 - 18/04/2008
3. TV Card: Pinnacle PCTV 300i
3. TV Card Type: Hybrid Analog DVB-T
3. TV Card Driver: 1.3.3.5 22/11/2006
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Mainconcept (Hauppaugge) MPEG Video
MPEG2 Audio Codec: Mainconcept (Hauppaugge) MPEG Audio
h.264 Video Codec:
Satelite/CableTV Provider: Hotbird 13.0
HTPC Case: Custom
Cooling: fan
Power Supply: 500W
Remote: Hauppauge 45 buttons
TV: Mivar 32"
TV - HTPC Connection: S-Video - Analog Audio

Hello, I have a problem which arises using DVB-S channels. Audio stops when switching to some channels and since then alla the channels have no audio. I have to turn off tv and turn it on to have audio again. Sometime happens audio is disturbed too. The same method as before fixes the problem.