hum..... did it blink or something when you turn on?

my guess, you messed up with top screen ribbon cable, there are SOOOO fragil
check TWICE all the ribbon cable connections

 

when i open my 3DSXL, i was sure about the connections too, but its doesnt turn on, open again and check all the ribbon connections.... put them really really tight... and WOW its turned on!!!!

anyway, it doesnt gonna hurt check again =/

good luck

 

Hm — upon closer inspection, it appears that I may have been slightly overzealous when using tweezers to insert/remove the ribbon cable on the "PWB/ABXY/AU-C/RED-01" board (I have the Red nN3DS XL), and possibly broke some of the wires inside it. Its ribbon cable seats perfectly on both ends and looks perfectly fine on the contact end that plugs into the motherboard, and the PWB itself appears fine.

Additionally, as I mentioned in my first post, if I have the battery inserted AND the AC adaptor is plugged in, I get a steady 'Charging' light, and as I was down to three of four bars of battery (before I turned the system off and all of this mess started), it's correctly sensing the battery's level. It's just not turning ON for some reason. :/

This, however, is making me hopeful that my problem is CONSIDERABLY easier to fix: because if it's just the cable, that's an easy replacement, and if the PWB is fried (unlikely, considering that the 'Charging' light doesn't go away after two or three seconds like it does when I plug in the system without the battery in it) — that's still an easy replacement!

The down side is that unless someone here has a PWB ribbon cable (and, optionally, the PWB itself) that they could send to me, I'll have to buy another nN3DS XL specifically to swap parts from. :/ Plus, since I'm used to repairing much older hardware (id est, stuff from the early pre-optical-media days of NIntendo — mostly NES and Super NES consoles and Nintendo 64 controllers), I still don't know for certain if this is my problem.

Thank you very much for your help so far, SmileCitrus! I really hope that this is a super-easy fix that just requires swapping out a ribbon cable and, optionally, also the PWB…

 

In that case, it would seem that it IS the PWB's ribbon cable (and/or possibly the board), because I disconnected everything except for the microSDHC card port, held the battery to its connectors correctly, and — nada! (I even disconnected the microphone, which was still connected in your photo.)

This is GOOD NEWS! This means that there's a very good chance that if I replace the PWB ribbon cable — and, optionally, the PWB itself — I will be able to simply perform a System Transfer to another nN3DS XL once I can power on my current one!

I was afraid I wouldn't be able to get this sucker working at all, and so I'd have to put up with — among other things — having to redo everything in Super Smash Bros. (And that would suck, because I've got quite a few Friends, 400+ StreetPass tags (accumulated over the last two years), over a million steps registered to the Pedometer, and in SSB4 I've done all but TWO CHALLENGES on the third Challenges card! (Specifically: the hardest one yet (Beat Classic Mode on Intensity 9.0 or Higher) and the longest one yet (getting 50+ hours in regular Smash).))

So, after I get my new New Nintendo 3DS XL (not necessarily from GameStop): would anyone happen to want my old New Nintendo 3DS XL for parts? XD Aside from the ribbon cable (and a pretty janked-up D-pad that insists on frequently doing double-inputs) and a broken clamp for the Circle Pad's connector, the whole thing is in great functional shape.

Also, it's interesting that you should link to that seller; I was thinking about getting a replacement D-pad from that exact guy — if I could first successfully remove the D-pad I already had without too much trouble. Boy am I glad I didn't buy the replacement D-pad board first!

Thank you all very much for the help! If I'm still having problems, I'll probably come back to this thread. In the meantime: if anyone else needs repair help, they can feel free to hijack this thread! (Unless you're in the future and posting to this thread would cause it to be necro-bumped. Don't do that, future person. Don't be that guy! Or girl.)

EDIT: Actually, upon a closer inspection of the ribbon cables that connect to the upper-right part of the motherboard, it would appear that those cables are probably damaged worse than the PWB-to-motherboard cable. :x So, my question here is: is it possible to boot the system with the top screen (and cameras, and speakers) effectively (and possibly literally) disconnected? Or will I have to temporarily move my current nN3DS XL's motherboard into another nN3DS XL (and just be really careful about connecting the lid's stuff)?

 

Excellent! That, too, is good news.

Hm… not-so-good news. Why do the speakers have to be connected, out of curiosity? ò.O I'm certain that my lower screen will work (or, at least, that it will turn on), so I don't need audio cues or anything.

Nnnnnoooo, more like the tweezers — which, sadly, are ones that aren't meant for crafts/gadget tinkery :x — that I had to use because I didn't have any better ones (and because my fingers are simply too thick to manipulate the cables correctly) made 'bumps' in the cables. In other words: I probably punctured/broke some of the wires in the ribbon cable with my tweezers.

Admittedly, I'm not SURE that the cables are ruined — because I can't even boot my system up yet — but in case they are ruined, I'm really hoping that I don't need the speakers to be connected for this thing to boot. :x

 

Ahhhhh, okay. That makes sense.

Well, hypothetically, instead of swapping the PWB from another system into mine, I could swap my system's motherboard into another system instead. So, in the event the former (and easier) option doesn't work, I could do the latter.

Either way: if someone were to lend me the prerequisite parts, I could repair my nN3DS XL quite handily.

Thank you for the help and clarifications, SmileCitrus! ^^

 

The capital 'N' stands for 'Nintendo'; the lowercase 'n' stands for the 'new' in 'new Nintendo 3DS'. It's how Nintendo formats the name, so I just abbreviate it accordingly. ¯\(º_O)/¯

If I could add the confetti-looking things around 'new', I'd consider doing that and just use the long name instead — but that would get tedious to read (and to type).

 

Yeah, but in regard to the Game Boy and Nintendo DS lines, all of the names were quite a bit different enough that you wouldn't confuse someone if you arranged the letters a little differently than someone else. (Such as "AGB" instead of "GBA"; both are valid since the former is in the model number, and the latter is just an abbreviation of its official name. ¯\(º_O)/¯)

I just wish that Nintendo had went with something like the "Super" or "Ultra" 3DS — or 3DS +/3DS Plus — for the new one, rather than going the "NEW!! Super Mario Bros." naming route. XP It would've been far less confusing when you're attempting to find a brand-new 3DS/3DS XL system — or, heaven forbid, a brand-new New Nintendo 3DS XL. x_x

It'd also make abbreviating it a lot less confusing.

Either way, I'll probably continue to abbreviate "new Nintendo 3DS" as "nN3DS", simply because it's how I abbreviate it. Plus, I doubt it's really THAT confusing to see an additional 'n' tacked onto it; it's fairly easy to guess which system in the 3DS family I'm referring to. :P

 

hello , i hate to be that guy since this thread has already a few days , i have a similar problem with my nN3ds , as you guys mentioned before i desconected everything but the thing is , mine actually showed up the blue light ,so i started pluging things one by one until it didnt showed the light again , it seems that even when this cable is unpluged the nN3ds seems to start fine . what is this cable and how do i replace it? http://i.imgur.com/rNEM5oe.jpg



Edit : it seems to be the camera ribbon , i have no idea if the cable is the problem or perhaps the camera hardware, still no idea how to fix.