Flashing red when trying to start motors

wl6

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Dec 7, 2025
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PV331 and NPVT581 TX powers up, connects to controller, can move gimble horizontal but get Red flashing leds why I try to start motors. I have connected to pc with Phantom, no errors found. Any help would be greatly appreciated.
 
I was able to use IPad Mini 2 for the Vision app, while watching the IPad when I try to start motors it says “GPS Disconnected” then goes back to Ready to fly non-gps. GPS not showing in Assistant.
 

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As the error says, the GPS puck isnt plugged in or its been damaged, I take it you took the top shell off for some reason
 
I did pop the top to check all cables and connections. I followed every cable for any type of issue.
 
I did pop the top to check all cables and connections. I followed every cable for any type of issue.
and is the gps cable plugged in
 
Yes, cable from gps plugged into main board where it says gps.
I do have a spare Phantom controller running 3.12 that I might try. The current FC is running 3.14
I have swapped gps pucks and no change so I’m thinking FC is toast.
 
Have you tried to take off in ATT mode? I think it doesnt require to have a GPS signal.
 
As the NAZA unit connects to the board i would check that you have it correctly wired up
 
As the NAZA unit connects to the board i would check that you have it correctly wired up
I’ll try and find wiring schematic to check correct wire connections.
I was thinking maybe the 3.14 revision was corrupted, so I have tried twice to reflash FC with same result.
 
I pulled out my P2 parts rig and put the gps puck from the P2V+ on it and it worked great. I tried both pucks on P2V+ and get GPS disconnected when trying to start motors. Both rigs have the P330CB H3-2D V2 main boards. I also swapped Compass and same result.
Am I right in thinking it’s the P330CB H3-2D V2 board on the P2V+ ?
The only thing I have not tried is taking Phantom FC from parts rig that has gps and wants to fly and put it on the P2V+.
 

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