故障の確認の仕方や、交換が必要なパーツ、道具などを教えていただけると嬉しいです。

よろしくお願いします。

（ちなみに、十字キーは上下と左は効きます 😫）

音は出るが画面が付かなかったため（充電ケーブルを繋ぐと電源は入る）、原因を探るために分解しました。

（この時点ではボタンの効きはちゃんと確認していませんでした。）

使用したガイドはNintendo Switch Lite Screen Replacementですが、スクリーンのテープを外す道具を持っていなかっためその手前（手順54）まで行いました。

分解後、左右の基盤をつなぐケーブルが断線していたため、そこが原因だと思い購入し交換しました。

一旦組み上げた直後は画面が付いたのですが、喜び勇んで再度組み直した後（ネジ類が仮止めだったため）、上記の状態になってしまいました。

• 左右の基盤をつなぐケーブルが刺さるZIFコネクタの目視確認（おそらくピン折れ、焦げなどはなし）
• ZIFコネクタのラッチが閉まっていること
• 効かないボタンの接点を無水アルコールに浸した綿棒で掃除

• ドライバーセット（Y00, PH000含む）
• 無水アルコール
• ピンセット
• はんだごて（100V 20W）
• テスター

よろしくお願いします。

⟐ Answer accepted 5月 10, 2026 at 20:33 GMT-7

⟐ Answer accepted 5月 10, 2026 at 20:33 GMT-7

⟐ Answer accepted 5月 10, 2026 at 20:32 GMT-7

初めての質問失礼します。

現在の状況としては、画面下に「緑色の帯」が出るといった状況です。

下側を軽く押すと、圧力によってか緑色の帯が出てきます。

また、再起動することによってなぜか直ります。

ハードウェア的要因かソフトウェアなのかわかりません！

ご回答お願いします。

英語/English

Excuse me for asking a question for the first time.

The current situation is that a 'green band' appears at the bottom of the screen.

When I lightly press the bottom part, the green band appears, possibly due to the pressure.

Also, for some reason, restarting fixes it.

I don't know if this is a hardware or software issue!

I would appreciate your response.

⟐ Answer accepted 2月 21, 2026 at 5:20 GMT-7

⟐ Answer accepted 9月 16, 2024 at 2:59 GMT-7

Thanks in advance.

update1: thank @dan0 for the response. Unfortunately, I can't test the Wii on its own, since I don't have another power adapter right now, but I'll try to get one. However, the voltage readings I took were from the power adapter itself, at the 12V output.

I've attached the images.

This is a general view of the transformer with the integrated circuits I mentioned earlier already replaced.

There's the fuse and the varistor that were replaced after they burned out.

Measure the output voltage at these two points: at the cable connector that connects to the Wii, and at the cable output from the motherboard.

Thank you very much for your help

⟐ Commented 7月 31, 2026 at 0:32 GMT-7

⟐ Commented 7月 29, 2026 at 9:46 GMT-7

This is how it should be

And this how it looks when it gets yellow

And When it gets blue

I have tried changing the sd card ribbon cables

And seated the cables properly with double sided tape

any suggestions ?

⟐ Answered 7月 29, 2026 at 6:31 GMT-7

It seems the drive has a tracking problem or a mechanical defect. I would like to request a warranty replacement for this part.

⟐ Commented 7月 27, 2026 at 5:52 GMT-7

⟐ Answered 7月 27, 2026 at 3:29 GMT-7

⟐ Commented 7月 26, 2026 at 22:10 GMT-7

I over-charged her across a few months and needed to replace the battery because of it expanding. However, now she seems a bit slower/fried, game cards not loading in sometimes, boot-up taking several seconds etc.

I've recently seen videos with replacing the charger port with usb-c, replacing the bottom screen for a glass one etc.

I basically want to know what things i should look into replacing and upgrading to help her run more smoothly and last longer!

I'm happy to answer further questions and resources for further reading on 3DS modding is appreciated as I'm also unsure of what I should be searching for.

Thanks for your time!!
~tea

⟐ Answer accepted 7月 26, 2026 at 11:44 GMT-7

⟐ Answered 7月 26, 2026 at 11:15 GMT-7

⟐ Commented 7月 26, 2026 at 11:14 GMT-7

I was driving in a car playing my charged 3DS and then I closed it and set it down. When I came back to it, the screen was black, so I powered it off. It would not power on after I powered it off so I came home and plugged it in. I tried powering it on, and the blue light, the charging light, the 3D Slider light and the Wifi light were all on, but the screen was black. I tried unplugging it, taking out the battery, taking out the SD card and turning it on and off but none of those worked. I checked for water damage, by listening to see if there was a popping noise.

Finally after repeatedly pressing the power button, it went to the screen that comes up when you press the power button once (Not hold down) while the system is in use, where it prompts you to either power off or to return to home menu. From there, it was able to return to home menu, where it was stuck on the loading screen for home menu. (The one where it says Home Menu and has a white backround.) The sound plays when you press the home button, but it stays there forever, I've left it on that point forever and nothing changes. The result says the same whether I do it with or without the SD card. I can turn 3D mode on and have it work while on that screen and the power off screen.

I've been mostly careful with my device, dropped a few times, but I have a wrist strap that has prevented most falls. No water damage has ever happened. A X and Y buttons slightly cracked from excessive SSB4.

I am wondering if this is either something wrong with the 3DS software or if it is some kind of damage to the actual circuitry. Thanks in advance to all who help.

Edit I: 2 Minutes after posting this, I found something that seems to have worked.

I read on... 3ds xl powers on but won't boot

That if you hold <L> <R> <Up> (Not sure if it was D-Pad Up or Circle Pad Up so I did both) and <A> it could solve it. So I tried this and it is currently system updating.

Edit II: An Error Occurs while Updating? Can someone help me with this?

Edit III: 3DS was updated to latest version, but now I am back where I started ;-;

⟐ Answered 7月 26, 2026 at 11:10 GMT-7

⟐ Commented 7月 26, 2026 at 10:45 GMT-7

Has anyone else experienced this?

⟐ Commented 7月 25, 2026 at 3:59 GMT-7

I cleaned the contacts and have continuity, but there are no signs of life. Zero sound, video, or light appear.

⟐ Commented 7月 25, 2026 at 3:53 GMT-7

⟐ Commented 7月 24, 2026 at 0:36 GMT-7

The one in this question does not charge, but it will power on if the battery has charge.

When plugged into the charger, the battery terminals measure bit under 4V, however the charging light does not turn on (battery or no battery).

When I first tried charging it, the battery went from 2.43V to 3.10V but would not go any higher. During this whole time the charging LED was off. I put the battery in another 3DS, charged it and placed it back and it powered on.

If I try to plug the 3DS in, and then remove the battery, it does not stay on.

Anything I could try to repair this board?

⟐ Commented 7月 23, 2026 at 18:22 GMT-7