Am 14.02.2013 08:46, schrieb david guerrero:

> http://www.youtube.com/watch v=HWvSIgWexh8&feature=youtu.be

This looks like the powersupply is too weak.
Use a regulated 500mA, 12V wallwart. (The 707 manual says 300mA
consumption, but to my experience a 300mA supply is not enough)

Florian