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D820 w/ D/APR USB problem

post #1 of 15
2/3/10 at 12:40pm
Thread Starter 
We have a D820 with a D/Port APR that the USB ports on the D/Port stopped working. The normal ports on the D820 work correctly.

I bought a used D/Port and the issue still exists.

So my next thought is the connection to the D/Port. But I'm at a loss as to what to do next. Thanks for your time.
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post #2 of 15
2/3/10 at 8:19pm
Not much you can do if it is the connecting port to the cable on the main board.

cheers ...
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post #3 of 15
2/3/10 at 9:57pm
other than looking for a damaged / bent pin on the dock????
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post #4 of 15
2/4/10 at 11:54am
Thread Starter 
Thanks for the thoughts. I already cleaned the connector pins. I bought her an external usb hub which solves her problem for now. Thank you!
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post #5 of 15
2/4/10 at 12:24pm
Cool with the easy fix. As long as she is happy.

cheers ...
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post #6 of 15
2/4/10 at 5:23pm
Quote:
Originally Posted by pc_g0d View Post
Thanks for the thoughts. I already cleaned the connector pins. I bought her an external usb hub which solves her problem for now. Thank you!

I believe that what maybe the issue if the pins etc are looking good, is likley a thermal fuse that blew and thus no power to the external USB devices
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post #7 of 15
2/4/10 at 6:21pm
Now I am being curious. Where can we locate these thermal fuse?

cheers ...
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post #8 of 15
2/4/10 at 9:26pm
I do it by tracing the circuit back until I find the loss of power.

it's not always easy to do, really depends on the board layout. but the +5 Volts on the USB ports should be protected by a fuse but I have seen some cases where it simply traced back into the IC Chip which means your SOL.
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post #9 of 15
2/5/10 at 5:28am
That makes sense. I have yet experienced in seeing a "fuse", but IC chips - sure, and plenty.

cheers ...
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post #10 of 15
2/5/10 at 1:34pm
Quote:
Originally Posted by qhn View Post
That makes sense. I have yet experienced in seeing a "fuse", but IC chips - sure, and plenty.

cheers ...

It is usually a SMT device, they are very small and look like a little white rectangler chip soldered at each end.
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post #11 of 15
2/5/10 at 2:03pm
Thread Starter 
I'm not good with tracing electrical stuff...would replacing the motherboard fix it? I'm doubting she'd want to pay the price for that. I like to give people options.

Thank you for the replies!
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post #12 of 15
2/5/10 at 2:19pm
replacing the motherboard should fix it, not worth it out of warranty IMO

I also meant to ask does the data side work - just no power on it
or is it totally dead
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post #13 of 15
2/5/10 at 3:10pm
Quote:
Originally Posted by dave-p View Post
It is usually a SMT device, they are very small and look like a little white rectangler chip soldered at each end.
You don't happen to have a pic to share, do you?

cheers ...
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post #14 of 15
2/5/10 at 8:53pm
Quote:
Originally Posted by qhn View Post
You don't happen to have a pic to share, do you?

cheers ...
Some look like this
LL
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post #15 of 15
2/6/10 at 10:06am
Cool, in my list now for watching out when I play with mobos. Thanks Dave.

cheers ...
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