T60p will not respond to AC adapter

[bhtooefr]

So, I had an issue with the old AC adapter for my T60p, where the strain relief on the DC cord had failed, and the connection to the laptop was intermittent.

Anyway, it got more and more intermittent over time, until last Friday night, when it suddenly, after rapidly cycling, failed completely - at which point it wouldn't even power the laptop through the dock.

I had a replacement cord (from DCPlug.net,) broke the casing of the adapter open, and installed that. Figured out the polarity from the old cord, DEFINITELY got it right, got it connected. Tried plugging it into the laptop... nothing. Checked the output voltage, only +10 VDC. (Do note +, I really did get the polarity right.)

Anyway, I order a new adapter, and it came today. Tried to plug it in... nothing. The dock recognizes it no problem, but the laptop won't charge from any source. I think when it was rapidly switching between powering the laptop and not, it killed something on the motherboard. (I did try another DC jack I have, again, nothing.)

I haven't torn the laptop down to the motherboard yet, but what should I look at first, and where on the board am I looking?

Right now, I'm stuck with a 233 MHz StrongARM-based desktop with an OS that has major... issues... and a non-JavaScript browser, and a dead WinMo phone (going to get that replaced today, though, hopefully,) so it'd be very helpful to get this machine fixed, and ideally without replacing the motherboard.

[richk]

The first thing I would check is fuse F2, right under the connector for the power jack.

[bhtooefr]

Realized I wouldn't have a way to fix the fuse anyway, so I just bought another motherboard. I'll sell the broken one on eBay, though.