i forgot to add, for some reason I couldn't enable the ground pour on eagle so i've just uploaded it with the tracks in situe.
its possible. Pulling 550mA may cause the USB chip to flag an error. Shorting out pins will blow it. Most newer boards have a 1500mA limit on the usb ports.
Do you have a photo?
It's a laptop.
The port doesn't work and I get an error message on boot up.
And I got error messages about overvoltages when I connected the DAB radio I was testing for CF from Craig.
The reason why pluging in the radio (fully charges up the caps) then remove and repluging in may work, it is because those caps have been fully charged already, ie there is little disruption on the USB supply on replugs
Try using an external powered hub or a powered USB device to see if the USB port still work. If it does then you know its the internal supply that broke inside your laptop. Does the radio work on your desktop?
It is hard to tell what caused this, possibly a shorted caps or something, maybe they were just too big, a disconnected caps shouldnt cause problems.
Its probably possible to repair it yourself, a board swap is usualy the norm in this case.
Last edited by ibf; 03-18-2011 at 07:40 PM.
I know the port doesn't work any more. The Laptop has 3 the other two work with everything I plug into it, the one in question works with nothing.
I think it may have done the same to one of the USB to my wifes' laptop as well.
I also have question marks against the Carnetix powered USB hub that I use in the car, one of the ports went awol for a while (the one this unit was plugged into to test).
Let's just say I am not very happy with CB and the unit at the moment.
E, did you measure is there 5v on that "dead" usb port?
if no, might be wise to open the laptop, and look for the USB fuse, usually right next to the jack
and replace, this is asuming you can do SMT desoldering
if you cant.... option #1 is get it to someone who can, option #2 replace whole Motherboard
btw, what kind of laotop? dell?
"Did you test it in carwings??"
Sun, Come shine my way
May healing waters bury all my pain
Wind, Carry me home
The fabric of reality is tearing apart
The piece of me that died
Will return To live again