メインコンテンツにスキップ

1.83 GHz Core Duo or 1.83, 2,もしくは2.16 GHz Core 2 Duo A1208 (EMC 2104/2110/2114/2124)

201回答 すべてを表示

Weird issue with starting up

Block Image

I’m having an issue with this hand-me-down iMac I got a while ago. It will only start up if the screen is disconnected from the logic board and if I hold the power button down while it is starting up.


iMac starting up when screen is disconnected:




iMac starting up when the screen is connected





This completely baffles me. I have still yet to try connecting the iMac to an external display, but here is what I have tried:

  • Reseating the RAM (the RAM is known-good)
  • Replacing the PRAM battery

Does anyone have any ideas of what could be going on here? I’m leaning towards either a logic board or a display issue.


Update (01/31/2019)

Alright so I played in the guts of this iMac and snooped around looking for swollen or leaking caps. I found none that appeared to be too swollen but there were definitely some caps that were a teensy bit bigger then the rest. Have we found the root of the problem?

Block Image

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 0
コメントを追加

1 件の回答

ベストアンサー

Examine the capacitors on the logic board (cans). Look for leaking and/or swollen ones.

このアンサーは役に立ちましたか?

スコア 4

12 件のコメント:

Quick question, not trying to shoot you down here but wouldn't the capacitors be on the power supply instead of the logic board?

さんによる

What are the diagnostic LEDs on the center of the logic board telling you? The reason I want you to look at the capacitors is that it is a very well known issue and i have seen a lot of these. Yes the power supplies do fail a lot on these but your symptoms indicate the caps.

さんによる

Alright, thanks for the clarification. I’ll take a look at the caps on the L-board and the PSU once I get home. Are the diagnostic LEDs in the videos not the ones we are looking for?

さんによる

@mayer updated answer

さんによる

Your picture shows a failed or failing capacitor.

さんによる

7件以上のコメントを表示

コメントを追加

回答を追加する

tr121 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 170