Stuck at Apple logo screen and not booting
I recently replaced logic board, battery connector, and DC-in board. I was excited to hear the chime and see the Apple logo. Well, it doesn't get too far after that. I tried SMC, NVRM, PRAM reset, even fsck -fy. Nothing worked. Interestingly, the DVD drive makes its usual noise at power on but does nothing when I try to insert any disc (won't pull the disk in as it should). When I power on without the hard disk, it comes to flashing folder icon with question mark. Do I need a new HD and/or optical drive?
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3 Comments
More details. I just noticed the sleep light dims immediately after boot chime. I see Apple logo and spinning wheel for about 30 seconds before everything stops and freezes. Pressing Option at start up displays HD icon, nothing else. Also fails to boot in safe mode.
by TwoHand
I was able to retrieve below information by using system_profiler in SUM. As you can see, there is no system serial number. I'm taking it to Apple Service. Will update after the visit.
Hardware Overview:
Model Name: MacBook
Model Identifier: MacBook4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 3 MB
Memory: 2 GB
Bus Speed: 800 MHz
Boot ROM Version: MB41.00C1.B00
Serial Number (system): System Serial#
Hardware UUID: XXXXXX-XXXX-XXXX....
by TwoHand
After all, it was the replacement logic board. Replaced with yet another logic board and all problems solved. Working perfectly now. I should've run Apple Hardware Test at the earliest possible moment. Although the first replacement board was a new one (at least that was what was said), the test consistently returned 4SNS/1/40000001 IGOC - 0.109 (value being anywhere between 0.106 - 0.110). Not much information about this particular error code, but it surely has something to do with logic board current sensor.
by TwoHand