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Frozen 13" Macbook, grey screen without logo, HD OK.

314 Views 5 Replies Latest reply: May 11, 2013 7:18 PM by Yo-yoo RSS
audiblefeast Calculating status...
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May 9, 2013 1:18 PM

I have a 13" Macbook 4,1 with 10.6.3 installed on an internal HD that I think is good.

 

I got it from someone who said that the screen was bad.  It powered up with chime, but screen was dead.  I replaced the screen with a known good screen from another 4,1 Macbook. 

 

On startup, I get the chime, but it sticks at the grey screen with no logo or spinning gear.  It will not start up from a 10.6.3 install DC or Diskwarrior CD.  Just sits on the grey screen.  Screen dims after a minute and computer goes to sleep after 5 minutes and wakes up OK in this condition, still to the grey screen/no apple.    The optical drive is noisey, so I'm not sure it's good, but it ejects the CD OK.

 

Reset PRAM, SMC, no change. 

 

Won't boot into Safe mode or verbose safe mode, but after about 20 seconds trying to start in safe verbose, a strange occillating/buzzing tone comes from the speakers and stays until I let go of the keyboard.

 

Macbook WILL boot into Target Disk Mode, but without showing the moving firewire logo.

I accessed the HD of the Macbook by reading it in Target Disk mode on a MacPro connected with a firewire cable.  Disk Utility on the MacPro verified the Macbook HD OK via target mode.  Wiped Macbook HD and reinstalled 10.6.3. via Target Disk Mode.  The result showed install successful, but I didn't configure the system.  Left Target mode, disconnected firewire and restarted Macbook;  no change, grey with no apple;  repeated all resets, no change.

 

Swapped known good internal HD from another 4,1 Macbook with known good 10.6.3 on it; result,  no change, grey with no apple.

 

Swapped the HD from the SICK macbook into the known good 4,1.  Known good Macbook boots OK to the 10.6.3 system on the swapped HD from the Sick Macbook.

 

So I think I have a hardware problem, but the HD seems like it must be OK.  Before I begin blindly swapping the logic board or whatever else I can think of, does anyone have any ideas what the problem might be?

 

Thanks!

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