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| 466MHz unit: no power to HD after HD & RAM upgrade https://www.powerbookmedic.com/forum/viewtopic.php?f=5&t=1942 |
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| Author: | osimp [ Thu Sep 11, 2008 8:33 am ] |
| Post subject: | 466MHz unit: no power to HD after HD & RAM upgrade |
I have upgraded the HD and RAM in several clamshell iBooks without any issue whatsoever. Using identical new components, I recently did this in a 466 MHz unit that was working prior to the upgrade, but find that the new HD is not recognized -- and neither is the original or any other HD that I try. It's pretty clear to me that the hard drive isn't receiving power. I've tried replacing the new RAM, without any change in behavior. (I've also tried a lot of other things, which I won't go into at the moment.) If I try to boot to a CD or DVD (DiskWarrior or 10.4 Install disk, respectively), I get a darkened grey screen with the apple logo but no further activity. HOWEVER, if I disconnect whatever HD is in place I can then boot to either of these disks -- but of course I can't go anywhere, as the computer has no hard drive. It has been suggested to me that, probably on the logic board, there is a surface mount fuse feeding the HD. While I could probably test that fuse (and possibly even replace it), I have not a clue as to its location. Anyone have information on this? Or other suggestions? TIA |
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