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オリジナル投稿者: Roger ,

タイトル:

Why logic board chimes when pin is touched with probe?

テキスト:

Hello Guys,

Maybe one of you can help with this unusually weird problem I have with my 820-2330 logic board. The board powers on, but won't chime or boot until I touch a couple of specific pins on chip U8900. This is what happens exactly; when the board is powered on and I touch pins VO or OCSET on U8900 the board then chimes and boots normally. It is driving me crazy trying to figure this one out. At first I replaced U8900, then I replaced both FETS, then I replaced the Critical caps after the inductor all to no avail. Any help would be appreciated.

Thanks,

Roger

デバイス:

Macbook pro 2008 Logic board 820-2330A

ステータス:

open