Is this header pin bad or not?

[Zestfully4]

Should I replace it? Is it damaged, or will it work? Is it safe to test with the power source of 4.5V? I have a feeling something might go wrong if connected to power. But if I should test it, perhaps there's a way you can recommend for testing with multimeter?

I don't have a replacement at hand and don't have experience yet to determine whether a component is bad or not with visual, so please understand.

 

[Tony Stewart]

I can't see what's on the top side of header. Is it an ESD shorting plug? Otherwise looks a bit fuzzy..

If it looks like a parallel array of 2S LEDs 4.5V sounds about right or add resistors and use 5V(?) Follow the traces.

You ought to invest in a programmable digital V A P power supply to adjust voltage with a current limit and display power. ~ $1/watt