Apexi boost controller not showing image but has 12v

[Roccrew585]

Just install it in a 1990 300zx, It has power( orange light glows, on the button) if i hold down any button , the images appear, but if i let go of the button ,it goes away. here is where the issue began, when i install it, it has constant 12 volt and stayed on even though the car is off, so cut the wire red and black wire from the boost controller for the mean time until i buy a switch (so it was working before), i added it on and thats where the problem began. Can it be the ground? should i ground it separately or keep it tap with the ecu ground? also i am missing the pressure sensor so i didnt install it, do i need it? thanks for helping me solve this problem.

[the converted]

First issues is that it is supposed to have a switched power source, not a constant one. Don't put a switch on it, just connect to the proper wire. I would definitely recheck all your wires to find out why it isn't coming on. Have you reconnected the solenoid, or is it still disconnected?

[Roccrew585]

it still getting 12v of power, so it should still power up. any other suggestion?

[the converted]

Did you connect both of the grounds? Did you solder the connections?