On off switch doesn't work.

Question edited for clarity, full 'make model (what it is)'. 'Waisted', the area around a female's middle. 'Wasted', wrecked.
Question moved from Television and Video.

Go direct to the maker for a warranty repair.

Contact nebo

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The cap may be seized because of a bad battery. Spray the end cap with wd 40 and let it set . You may need some pliers to help.

In order for someone to help. We need more information, the manufacture name, the exact model number. Usually found somewhere on the device. That model number has to be the longest model I've ever seen. Maybe the LED is bad.

Invariably a bad or defective back light inverter in LCD tv.
or LED driver board.

Perform a flash light test and follow the steps as shown in the LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

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Your batteries have corroded. I had to use a vice and water pump pliers to get mine apart because the aluminum is very susceptible to corroding batteries. My switch has always given me problems and now that the aluminum has corroded the switch has died. I can clean away the corrosion but the switch does not work. It is time to throw it away. Too bad because when it did work it worked great. There are NO parts out there to repair it. I guess it's time to add some more to the local landfill instead of fixing the light and continuing to use it.

If the flashlight was working properly before you changed batteries, it's most likely that some tolerance is off by just a smidge so that you're not getting quite the right contact to close the circuit. You can make a thin wafer out of aluminum foil that's folded over and over onto itself and use that as a shim to increase pressure on the battery cartridge. That may be all you need.

If there is a switch on this light, as opposed to a simple screw on/screw off pressure connection, I would try checking continuity in the switch to make sure that is working correctly. Many manufacturers cut corners on the fit and construction of their flashlight swtiches, so a part can go out of alignment quickly and easily, causing failure of the switch until you can nudge those parts back in line.

Good luck!

short circuit causes this problem, no hope better replace it by expert.

small peice of Aluminum foil in the end then batteries + away from head - towards head....BINGO

Wow what entertainment. Both the poster and the bobint17 don't have a clue how this flashlight works... why answer a question you don't know the answer too? To screw with people? To sound like you know what you're doing?

Anyway, the Gerber TX 3.0 uses a Luxeon 3 LED. There is no bulb. It is not designed as a user replaceable item and unfortunately even someone skilled at soldering and such can't fix the light because the head is permanently attached and not designed to be removed allowing access to the LED assembly. Can the head be removed? Possibly. Will it damage something while trying to remove it with a lot of force? Possibly. Should you try? No. Why? Because the light has a limited lifetime warranty from Gerber. Send it to them and they will fix or replace it!!!