T420 will not power on
I have tried plugging it and booting without the battery and trying a different t420's keyboard to no avail. the light on the keyboard doesn't light up and the computer itself doesnt make any of the normal fan sounds when you try to power it.
any thing els i could try?
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I have a similar problem, in that the laptop just stopped working. No lights, nothing when its plugged in. I tried all the easy stuff. I'm now trying to see if its the powerjack module or what component on the MB went bad. Ambitious I know. Any advice on trying to narrow down problem would be helpful. A schematic and boardview would be lovely. Thanks.