Need help with the dovpo gx-200

[Melissa Palmer]

I have the dovpo gx-200 mod. It was working great, but now won't work at all. The screen says F3. What does that mean, and what can I do to fix it?

 

[VCross]

Only thing I can find on Google is it's some sort of short circuit protection error. I'd have a look at your batteries and contacts and make sure everything looks up to par.