USB Ports Dead on RPi2 Previously Working

[krystal92586]

I'm helping a friend with his Raspberry Pi. It worked for a year and suddenly, the USB ports died. The wifi dongle used to light up when plugged in and it doesn't anymore. The USB hub doesn't light up either. A keyboard and mouse don't work when plugged in either, even by themselves to avoid over power issues.

I cannot SSH into it because without the keyboard, I cannot find the IP address or reinstall the OS. There are hundreds of IP addresses here at school, so I cannot use process of elimination. I've used two different power adapters that have worked before and work with other Pis.

It has sat around for weeks without being turned on, so I don't think it's an issue with heat or the polyfuses (does RPi2 have polyfuses?).

What do you suggest? It's a Raspberry Pi 2 Model B.

[krystal92586]

Additionally, it does not work when loading NOOBS, the laser in the mouse doesn't even light up. At the screen to select the OS to load, the mouse and keyboard do not work and nothing lights up.

[drgeoff]

If booting Raspbian, the IP address is usually displayed on screen somewhere amongst all those booting messages.

However if the USB ports are not working there is a fair chance that the ethernet port is also not working.

There is also a method to specify a static IP address by editing a file in the boot partition. https://pihw.wordpress.com/guides/direc ... onnection/

The boot partition is visible even putting the card in a Windows PC. Edit there, put card back in RPi and boot it. Then set the PC to a suitable static IP and connect it to the RPi with an ethernet cable. If the RPi's ethernet is working you can ssh into it.

Have you any means to test if the USB ports have 5 volts present on them. Even trying to charge a mobile phone from them will tell you that.

[krystal92586]

No 5V on the USB ports. When turned on, it doesn't charge a phone or light up a mouse. I forgot that they wifi dongle won't work, so I couldn't SSH into it anyhow.

Is it dead?

[DougieLawson]

There used to be a problem on the RPi 1B models viewtopic.php?f=28&t=36644 but that crystal was eliminated on the B+ (and beyond).

Are you sure you've got a RPi 2B?

[drgeoff]

There used to be a problem on the RPi 1B models viewtopic.php?f=28&t=36644 but that crystal was eliminated on the B+ (and beyond).

Are you sure you've got a RPi 2B?

That problem with the crystal did not prevent 5 volts appearing on the power pin of the USB sockets.

If the RPi is booting but there is no voltage on the USB power pins, the USB power switch circuitry has failed. Possibly due to electrical abuse.