Thane,
Please re-define the laptops power interface!
Your contiguous continuity checks seem OK so far, there is a "ground" bus
in play.
What scale on your multimeter is dropping from 100 to 70?
What comes into the laptop depends on its' 'power' cord. If it brings in
low AC, then 2-wire; heck, even with normal AC, I'd expect 2-wire. If this
is true, then the internal AC/DC conversion is leaking/bad. I would think
the laptop frame and/or common ground bus is a zero.
But, maybe you have a 3-wire interface (hot-new-ground). That's a new problem.
I just do not know at this point. For sure, something is odd ATM.
Best,
Duncan
At 16:45 02/11/2008 -0400, you wrote:
At 04:27 PM 11/02/2008, DHSinclair wrote:
First off I am surprised that the 'front grill' is even metal. That
said, I would presume that, if metal, and, that there is a contiguous
connection, that it should connect to the LOW side of any power (source)
connection. Like DC(-) or AC(neu).
I do not have a lot of laptop experience. How does direct wall AC
interface with a laptop? I should think a wall-wort, or, some 2-pin
homogenized interface (uh-oh!)
Again, you have a really good one!
If I check from front grill to the VGA port, USB port, Firewire port, or
outside edge of the power jack on the laptop, the connection is
contiguous. If I try from the middle pin of the power jack to the front
grill, my multimeter drops from 100 to 70, which I read as a a partial
connection (some resistance.) All this seems strange to me, because I
would think the outside case of the laptop shouldn't be connected directly
to power for safety reasons. Of course, I may be completely
misunderstanding this.
T
