can a trackvision a 5 be repaired

[crown]

 found a 3 yr old kvh trackvision a 5 for sale the owner had it on a suv said worked good but now only works sometimes
if i buy this cheap how hard would it be to get fixed ? any thoughts sounds to me like somethng loose if it works some time
and other times no or could it be the reciver is bad ? i known its a long shot thanks john

[pipes]

http://www.fixya.com/support/p36654-kvh_tracvision_a5_car_video_player