Monday, May 18, 2009

Repaired Susan McKenna iBook motherboard

Hi,

I repaired the motherboard on Susan McKenna's iBook, and reliably booted it several times and ran it for several hours. These motherboards have a defect where the graphics power supply chip develops a cracked solder joint, and Apple hasn't figured out a good fix, so I doubt my fix will last forever (I just re-soldered it using a microscope and fine-tipped soldering iron), but if it happens again, I can solder it again. (And next time I'll probably have a hot-air SMD solder rework station instead of just a soldering iron.) Ways to minimize this problem are to 1) always use two hands to pick up the laptop, and to 2) just leave it on all day instead of turning it on and off every time you use it, since power cycling tends to stress this defective joint.

I think it could still use a re-imaging. I started to run Software Update but it was taking a REALLY long time. It only has 256 MB of memory, so I ordered a 1GB SODIMM, which ran $44 including shipping. I can either bring it by tomorrow or wait until the memory arrives and bring it back then.

Regards,
Dennis
P.S. I was out sick last Friday, and the prior Friday just headed to work when the power outage seemed like it was going to last a while.

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