Possible causes for no power on?

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New Nintendo 3DS XL

The Nintendo 3DS XL 2015, marketed as the New Nintendo 3DS XL, was released October 11, 2014 in Japan and February 13, 2015 in North America.

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Dan Palazzolo @danpalazzolo

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Posted: Jul 17, 2016

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Possible causes for no power on?

I opened my N3DS XL to do a bluetooth mod( tapping into the battery 3.7v pins and headphone jack, only), the mod was sucessfully soldered in and powered up, however, the 3DS would no longer power up giving me only a brief flash of the blue led and no screen activity. I desoldered the mod and checked for bad fuses, this board is not labeled for f1 and f2 so the ones I checked had a dark green appearance and tested ok. Hooking up the wall power adapter gives a solid orange charge light but still no power to device and same blue led blink. My ribbon cables all seem tight and untorn and I see no bridged connections or stray solder on board. Any ideas where to troubleshoot next?

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2 Answers

Seth Reign @sethreign Rep: 37 2 · Answer 1 · 2026-06-17T04:44:21-07:00

Seth Reign @sethreign

Rep: 37

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Posted: Jun 17, 2026

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Usually when the blue led turns on & then instantly powers off it's almost always one of the screens or the camera assembly. There's a consistent 5v rail you can use to power the bt module. In the japanese new 3ds model there's test pads next to the game cart. The 5v rail is the 3rd test pad from the bottom. Personally I would never use the battery directly to power any mods. You can easily find a 5v rail with a multimeter. Hook the black probe to ground & touch the red probe to the test pads until you find a 5v rail. I've been fixing and modding these since they came out & rework circuit boards for a living.