Chosen Solution

When I go to take a picture the flash pops up, but when I actually take the picture there is no flash.

Your light bulb could be broken or disconnected. Shake the device and listen for any loose wires that may have separated from the light bulb to the battery. For any further inquiries, please refer to the troubleshooting page.

Like Austin Tucker said, the problem could be the light bulb, but it could also could be the capacitor used for making a very bright flash. If you take apart your camera, it most likely would look like a long thin battery. DO NOT short the pins of the capacitor, as if there is still charge in the capacitor, it can make a massive spark and you could get electrocuted. Cheers Diode