 Re: Pins on System Panel Connector?
On Wed, 19 Sep 2007 20:34:05 GMT, Jethro
<Wilson@somewhere.org> wrote:
>I am putting an ASUS P4B53-VM motherboard into an older Gateway case,
>and want to at least connect the 'on' led to the pins that are on when
>power is on. Seems simple enough.
>
>I found the pins that come on with power and connected them to an led
>on the Gateway case. That led lit fine, but after a few minutes or
>so, it dimmed, and never lit bright again. So - I am wondering where
>I went wrong here.
>
>Any comments?
This is typically what would be expected to happen to an LED
if it were subjected to excessive current. If you happen to
have a circuit handy through which you can control (Limit)
about 20mA of current, this would be a more complete way to
test the LED itself, or of course to plug it into another
motherboard's power pins or that motherboard's IDE access
pins (then initiate an IDE access) but otherwise we might
presume that since it is still receiving power as indicated
by the dim glow, it is beyond viable at this point.
I wonder if the pins on the Asus board were 5V and ground
instead of LED and ground, although I would've expected that
to burn out the LED completely within seconds. If you've a
multimeter, you might measure the voltage on these pins.
I can't say that you necessarily did anything wrong. It
would be expected that Gateway used a standard (although
sometimes dual colored type with 3 leads, two anodes) LED
and that the correct two LED power on pins on the Asus board
should have driven it at an acceptible current. IOW, it
shouldn't have gone dim unless there is something I'm
missing.
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