How do I remove and replace the built-in flash in a Nikon D80?
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\$\begingroup\$ possible duplicate of How can I tell if the built-in flash on my dSLR is broken beyond self-repair? \$\endgroup\$– Evan KrallCommented Apr 30, 2011 at 19:07
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1\$\begingroup\$ Best to discharge the capacitor before poking around. Usually under the left grip. You can use a resistor (2k ohm 5w) or use a volt meter to bleed it down. The chances of it killing a healthy adult are very remote indeed. And don't forget to remove the battery first. \$\endgroup\$– user40224Commented May 31, 2015 at 23:41
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\$\begingroup\$ Killing, maybe. Injuring, no. Startling you enough to hurt yourself by falling or losing control of tools, not unlikely at all. \$\endgroup\$– rackandbonemanCommented Dec 5, 2018 at 19:39
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The best way is to take it to a certified nikon repair center to have it checked out, if it's under warranty. Otherwise seek out a camera repair person who can service it for you.
See this related question for why attempting to fix your pop-up flash is a bad idea. To summarize: you could seriously injure or kill yourself if you try.
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3\$\begingroup\$ To put the danger into some perspective: a cardiac defibrillator uses the same circuitry as a xenon photoflash -- same high-voltage generator, same capacitors, same regulating circuits (well, except that they're designed to fail safe) -- except that you take the place of the flash tube in the circuit (and the method of initiating the discharge is different). While the pop-up may not have 400 joules ready and waiting (as, say, a studio strobe easily might) it can trigger an arrhythmia or a fibrillation. \$\endgroup\$– user2719Commented Apr 30, 2011 at 20:41
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\$\begingroup\$ I once took apart disposable camera after removing the film just to mess around. As soon as it was open, I accidentally touched a circuit near the flash and my right arm was instantly numb. I was lucky. \$\endgroup\$ Commented May 2, 2011 at 14:32