Can´t get Neopixel Blade to work

[Blackshire]

Good evening Gentlemen,

I have a question which might not be simple to answer...one might hope though
I recently aquired a saberforge build kit with a golden harvest v3 soundboard,
Neopixel connector, battery etc. and a Neopixel lightsaber blade.


Since this is my first build and I have absolutely no soldering experience the manual task was challenge enough.
But I managed....Now the problem.

The board seems to work fine, I can hear sound, switch lightsaber fonts and so on, but I cant ignite the blade. I do get
a few pixels to flash for a second but that´s it (Amperage of the battery too low?...though I think it would be weird...why sell a kit, that wont work as intended?). What is the usual method for testing if the LED Strips are working and are soldered correctly in the pre-assembled blade?

Thanks in advance

Post modified -FJK