メインコンテンツにスキップ

モデル番号 A1418 / Late 2012 / 2.7 & 2.9 GHz Core i5 or 3.1 GHz Core i7プロセッサ

211回答 すべてを表示

No Power - won't turn on

My computer just shut down and won't power back on. Won't do anything. It is like it isn't even plugged in. I have tried a different power cord. I tried holding the power button. I have unplugged everything from the usb ports.

I have opened up the computer - I am wondering where the diagnostic led lights are. I am wondering if it is the power supply board - it does look like some wiring melted - although its not black or burnt...

Block Image

回答がありました! 回答を表示 同じ問題があります

この質問は役に立ちましたか?

スコア 2
2 件のコメント

The diagnostic LEDs are to the right of the RAM slots.

さんによる

Could be a bad power supply unit

さんによる

コメントを追加

3件の回答

ベストアンサー

Be sure to discharge the big capacitors and handle it with one hand. I may be mistaken, but that looks like where the transformer bridges from the AC side to DC side. It will have very high voltage there. If that's exposed wire in the pic then it is likely indicating a problem. The end of one wire looks yellowish too, as if it may have been hot. All of your symptoms point to a bad power supply. About 70% of the time I see these it's the Power Supply, so I'd definitely put my money there.

このアンサーは役に立ちましたか?

スコア 2
コメントを追加

The diagnostic lights are to the right of the RAM slots.

このアンサーは役に立ちましたか?

スコア 2
コメントを追加

The diagnostic lights are under the RAM slots. See picture

Block Image

このアンサーは役に立ちましたか?

スコア 1
コメントを追加

回答を追加する

Lesli KeepSimple さん、ありがとうございました!
統計データ:

過去 24時間: 0

過去 7 日: 0

過去 30 日: 1

今までの合計 1,477