Well, first a battery went bad in the saber, then after I changed the batteries out, it worked for a few minutes, then turned off altogether and now won't turn on. I don't have any electronic fixing tools, but if someone can handwalk me through what to get and do, I wanna try to fix this thing. I have a minimal knowledge of electric work from over a decade ago. It is a phantasm initiate v3
I can help only with the basics. You say it's a stunt saber, so I'm working with the assumption that you have the standard 4xAAA setup.
First and foremost, have you verified that all four of the batteries you're currently using are good and have a full (or nearly-full) charge?
Have you checked all the contact points in the battery "cassette" (for lack of the proper term) are clean and free of dust, corrosion, or anything else that might interfere with electrical connectivity?
Have you checked the connection points where the wires meet the battery "cassette" to verify whether they seem to be making good contact?
If all this stuff seems to be in good order, then I will have to refer you to forum members with more experience (and tools) relevant to electrical troubleshooting. Good luck!
Also, since you're looking at troubleshooting this yourself, is it safe to assume that the saber is out of warranty? Because if you do anything other than clean the contacts or swap batteries, I'm pretty sure that will void the warranty.