メインコンテンツにスキップ

2011年初期のモデル。モデル番号はA1278 / 2.3 GHz i5 or 2.7 GHz i7 プロセッサー。

855回答 すべてを表示

MacBook Pro: No back light and does not turn-on with battery alone

820-2936-b logic board fuse

i have 820-2936-b logic board, no back light, need to know fuse location, also does not turn on with battery only, even with fully charge battery, need to connect with magsafe, is that for another fuse

この質問に回答する 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:

Can you give us the last four digits of your serial number to we can correctly identify which model you have.

さんによる

2011 macbook pro 13" i5, 2.3ghz, logic board no is 820-2936-b

さんによる

MacBook Pro (13-inch, Late 2011)

Serial Number: C02GV3WTDV16

さんによる

logic board serial : c021415041fdtn5al

さんによる

コメントを追加

2件の回答

最も参考になった回答

It sounds like you have two issues here:

You state the system does run working from the power adapter. So do you see the faint image of the desktop on the display? Use a flashlight to shine tough the lids Apple logo (a poor mans backlight), are you able to see the desktop icons? If you are then you know there is an issue is within the backlight circuit. Which could be a fuse, bad cable, WLED or inverter depending on the model.

Your second issue where your system won't work with the battery alone tells me you have a power control issue which often comes down to a burn't FET or comparator in the charging circuit.

But without knowing the exact model we really can't answer your question.

The 820-2936-b logic board is not from a MacBook but a MacBook Pro.

このアンサーは役に立ちましたか?

スコア 1

コメント:

yes 2011 macbook pro a1278 i5, 13"

yes i have two compactly different issue

1. no back light, with a flash light i can see the image , with external monitor it works fine , so i need to know the fuse, or the reason, already cheak with a different lcd from still no backlit so it must be logic board,

2. with out magsafe it doesnot turn on, but battery receive charge . it was liquid spilled, i already cleanned it professionally. im assuming some fuse or capacitor also burnt out

さんによる

also i know some component level repair with hot air solder, just need to know which part to change and where to chk, thanks

さんによる

Did you fully remove the logic board when you cleaned it? On the other side there are more logic which may need cleaning. To fix the display OT's answer should do it.

さんによる

ya i have computer repair store here in winnipeg, i did professional cleanning, took out logicboard, i did fix lot of logic board just cleanning too, and have some experience on component level repair too....

さんによる

コメントを追加

sabrinachristal, the fuse is reference designator F9700 and is a 2AMP-32V in a 0402 package. Hope this helps, good luck.

Update

Block Image

Reference designator U9701 is the LP8550 backlight driver.

このアンサーは役に立ちましたか?

スコア 0

コメント:

OT - Your the Man! ;-}

さんによる

i checked this fuse and both side had 12v, !!

さんによる

i think fuse is good, wled driver may be bad, which one is that and what is the part number

さんによる

コメントを追加

回答を追加する

sabrinachristal さん、ありがとうございました!
統計データを表示:

過去 24時間: 0

過去 7 日: 0

過去 30 日: 1

今までの合計 906