Sound cuts out every 4 seconds when video camera plays through HDMI

Are u shure the tapes are not damaged??

you camera use a HDMI cable,
If you play a video your hear sound?
If don`t show images or videos and not sound.
May the cable HDMI is failure.
You can try with another cable or buy it
http://www.amazon.com/Sony-Cyber-shot-DSC-HX100V-HDMI-Cable/dp/B005DNM4EY/ref=sr_1_15?s=electronics&ie=UTF8&qid=1316631175&sr=1-15

Try replacing the HDMI cable.

you tried switching wires. maybe its your ps3. dont think you can return those can you?

is it ran through a HDMI cable?
sometimes the source is at fault or it could be a bad hdmi cable or maybe a bad hdmi port. if your using a hdmi try plugging it into another hdmi port and see if that helps

try a hard reset press and hold the power button for 5 seconds this will reset it too factory (only the settings you wont lose game save data) see if that helps

Sony has a firmware update out to fix this.

The PS3 has an issue with what's called the "HDMI handshake" between the PS3 and the TV. The PS3 does not even realise that this is happening. What you might try to do is turn the system on, play a game, and when the flashing and no sound occurs, unplug the HDMI cable from your PS3, wait a few seconds and plug it back in. This may resolve your issue. If it doesn't work, try component cables, there is no known issue with this problem occuring with this type of connection. Good luck!

the problem may be in that you have two audio outs conected, one stereo via rca and other hdmi remember that hdmi is audio and video outs or two digital outs one hdmi and other coaxial or optica to tha dacs, put only one outs and thats the solution
i hope i could help you

it happens to me alot lately i think its the actual hdmi port of the ps3 just unplug the hdmi cable and plug in and it should work just fine.