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iMac Intel 27" EMC 2309 (Late 2009, Core 2 Duo 3.06 or 3.33 GHz) ID iMac10,1, EMC 2374 (Late 2009, Core i5 2.66 GHz or Core i7 2.8 GHz) ID iMac11,1

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Only bootable in safe mode,damaged vsync cable

This iMac have a damaged vsync cable.

it can only boot up with safe mode, without safe mode it will always stuck at the apple logo after the chime or load up a cursor then became the beach ball. If it idle long enough in this state, the display will go to sleep.

When in safe mode, I can't run cinebench to test the gpu in safe mode. If I try to browse the web, Safari will flicker non stop, the video is just black colour. If I connect a external monitor and drag safari to the external display, I can view a flickering image of the video.

If I use safari in recovery mode, it flicker a lot lesser but stuck with beach ball and flickering stop.

Is this more like gpu issues or I just need to replace the vsync cable?

Rispondi a questa domanda Anch'io ho questo problema

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You'll need to start off replacing the Vsync cable.

Your symptoms are not at a point which tells us enough.

I would also recommend you try either booting up on an external drive or try running in Target Mode connected to a second Mac to make sure your drive is OK.

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The drive is definitely working, tested with known working unit. Currently using a SSD. Just curious that can the vsync cable cause it to not bootable. Will change the vsync cable once I receive it

da

I believe you that you think the drive its self is good. Please still do the tests as it is also testing the system.

da

@danj the vsync cable is working, after i reformat the SSD and intsall yosemite, i was able to watch youtube video. However, still wasn't able to boot up normally. I had remove all the ram and test it one by one. Any suggestion on how to proceed from here?

da

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cheelam1220 sarà eternamente grato.
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