R34 MFD power on outside of the car

[bigboss59400]

Hello,

I have some issue with my MFD so I'm wondering how can I start it outside of the car.

I obvisouly connected pin 1 and 2 to 12V and 13 and 14 to GND and also try to wired the ignition pin (12) to 12V

But the MFD still refused to power on.

The MFD start when installed in the car.

PS: pinout of the MFD in attachement

New Bitmap Image (2).bmp

[GTSBoy]

I'd guess you'd probably put 12V on the ACC also, but it probably won't change the result. I think that there will be at least some data signal pulse from one of the vehicle's computers to tell it what to do.

Your best bet will be to make up a patch loom to plug into the car side of the wiring and the MFD so you can bring it out a few metres.

[NZ-GTT]

As above you need to put 12V on pin 3 for acc power source. I powered mine up while removed from the car, it does not need the vehicles computers.

[bigboss59400]

thanks for your input

So power pin 1 2 3 at 12V and 13 and 14 at GND and the MFD start

Any idea why I get a white screen after replacing the screen (even by putting back the old one ?)

[NZ-GTT]

Does it still work when plugged back into the car? If not I would check that the ribbon cables are seated properly.

[bigboss59400]

Thanks for your help

not same result if powered in the car or outside

I got white screen

Flex ribbon between motherboard and LCD assembly is seated correctly also this flex is fine I made a continuity test on it

Edited January 5, 2020 by bigboss59400

[bigboss59400]

Hello,

I'm still in the debugging of my MFD, can you confirm:

- the MFD is running (or at least show something on the screen) by just putting power on it ?

- to show the NTSC video input we just need to press the TV button ?

Best regards