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RPI 3 nousb

Former Member

I recently got a pi 3 with the 7" touch screen. I set it up with berryboot and installed jessie. I got to were I needed to use a keyboard and that is when I found out the usb ports didn't work.

I went through the following link to try to fix it but nothing there helped.

https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=53832

 

I've tried keyboards and mice from working linux computers, I even tried a powered usb hub and nothing. I've tried running without the touch screen(via ssh) nothing is recognized.

I've tried power supplies from my other pi's with change. Do I need to post dmesg output? Is it possible I got a bum Pi?

-dan

  • in reply to royleith

    Roy Leith wrote:

     

    Just to be certain, measure the voltage at the GPIO 5V pin after the PI has booted and make sure it is still around 5V (the actual voltage at the PI is higher, but I think there is an on-board regulator feeding the pin and the USB port).

     

    No. There is no regulator for the 5V. The incoming 5V is passed through a fuse (should be "automatic resetting"), and then passed on to USB (through some more components on the newer raspberries) and directly to the GPIO.

     

    There IS a measurable voltage drop over the fuse, I expect the "new" components in the USB area to have less drop, but it will still be measurable.

  • in reply to royleith

    I downloaded the image and used windisk32 imager and still no working usb ports. I got another pi 3 and psu to go with it, the second pi 3 say's made in the u.k. and not p.r.c. like the first one Before I ask MCM for a replacement or refund should I bother to compare voltages' between the two pi's?