help with mag's lsd

[digmi]

my lcd is working and the lad is on, but i think that the signal not send correctly ( the broblem is not coming from the wires ), and the led blink from sec to sec, so my question is if someone kend send me some link that show the menual servic of mag model 780, or can tell me what he think that go wrong (in the modols, main bord or something else). tnk