screen went blank? and also lost sound on recorded video

[Topgun Scotland]

Hi all,  was just out for a wee fpv flight when my screen went black! Wasnt a great feeling but managed to get her back, as soon as i landed and cut the motors the screen returned to normal, the second i throttled up, blank screen?  I watched some of the footage and at the very second the screen goes blank the sound stops on my gopro, the whole video goes silent,  anyone experienced this or knows what the problem is?  i'm downloading it onto youtube and then will post on here, was working very nicely then blank, dont understand,

Thanks
Scotti

[Topgun Scotland]

heres the footage, everytime theres no sound is when im loosing picture

http://youtu.be/g-C1IUeIXyk

[DaveyLC]

Voltage went too low for your Camera/vTX?

[Topgun Scotland]

Voltage went too low for your Camera/vTX?

Hi Davey


Just charged batteries and went out (night flight) and still no picture, going to lay everything on floor tomorrow and check everything, will let you know when i find the gremlin