I know this might be a stupid suggestion, but it has happened to myself and a couple of other people, make sure your AUX is set high if your using the AUX DHC's lol

I run my Vesta on my tac character, 3 Aux DHC's Fore, 3 Phaser turrets aft, power setting on Aux is 125

Tactical Consoles:
Tactical - Phaser Relay x4

Engineering Consoles:
RCS XII Blue x2

Science:
I have this filled with the consoles that each Vesta comes with. I find them to be very very useful, especially when I'm in CSE and someone doesn't follow the 10% rule :p