hi guys new to the forum, ive come on a recommendation that you are the guys to ask when i need help. this problem is giving me a headache, please help me.................

i have purchased a 2nd hand kenwood kdc 627dvd head-unit, with the separate brain unit. i found the installation manual on line, and wired it up in the correct way(i think). the red security light is flashing behind the security panel, so i know the unit has power.

However, when i connect the security panel, the red light stops flashing( i can peak behind and see its not flashing)as though its detecting the panel, but the unit will do nothing. it wont power on, light up or anything. i know some head-units eject or try to eject a cd when 1st connected, mine doesn't make a sound. there's just nothing.

please help me guys, really want to get this going.

cheers