I am Kratos, king of motherboard repair

T400/410/420 and T500/510/520 series specific matters only
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markba633csi
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Joined: Thu Feb 12, 2015 7:34 pm
Location: Mt. View, California

I am Kratos, king of motherboard repair

#1 Post by markba633csi » Wed May 11, 2016 4:55 pm

Been working on this T400 MB for about a year off and on, as a challenge. Never worked on a ThinkPad before. No power, turned out to be an internal board short at the back edge probably caused by battery corrosives. Couple of 0.5 amp fuses blown. Careful X-acto work and a couple jumper wires and I just got it into the BIOS menu.
There may still be a charging problem but I think I'm getting close to putting it back together.
I spent 2$ on a set of schematics from a ebay hong kong outfit which helped a lot.
Battery and fan both required for bringup, plus keyboard and ram.
Thanks to everyone who helped! Great forum!
Mark Silva
Mt. View, Ca

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