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F16V4 expansion board not getting power

Started by bhinkle50, October 20, 2021, 09:54:41 AM

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I got my F16V4 and expansion board a few weeks ago and am currently having an issue getting the expansion board to power. 

The F16 is configured correctly to have the 16 local + 4 smart receiver chains.

When the jumper on the expansion board is set to be powered from the ribbon cable, the F16 will not boot and the expansion board does not light up at all. Powering down and removing the ribbon cable and the F16 boots up fine.

I submitted a tech question on the website trying to determine if there is an issue with the expansion board I have, but I haven't heard anything back.

Does anyone have a suggestion on how to fix?


Have you disconnected all cables from the expansion board other than the ribbon cable?


Don't know about the V4, but do the ribbon cable connectors have tabs to force the cable to be plugged in correctly?  I know with the earlier boards, SOME came with cable connectors with indexing tabs and some did not.  If not, are you sure the cable is plugged in correctly?
Using LOR (mostly SuperStar) for all sequencing - using FPP only to drive P5 and P10 panels.
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Thank you for the replies.

There are no other cables connected to the expansion board.

Yes, the ribbon cable I received does have the notch as do the F16 and expansion board. I also verified the pinout just to make sure. I am going to get another ribbon cable just to rule out an issue with the cable, but I think that's a long shot.

It definitely appears like a short of some kind because the F16 doesn't light up the same way when the expansion board is connected and it's powered on. I'll try and upload a couple pics later today.


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