Help with USB Devices

[rgatch2857]

Okay, so I correctly installed the NOOBS software onto an 8GB SD card and it works fine. I hooked up my Pi with an off brand keyboard I had laying around and, no surprise, it didn't work. So, I bought the Logitech MK320 Keyboard and Mouse Combo and the Belkin Hi-Speed 4-Port USB 2.0 Hub model F5U234, and hooked up everything in the exact order specified by the instructions of both devices. I hooked up my combo to the hub and my Pi to a wall adapter and turned it on. (Keep in mind that I am using a power source for my hub) For some reason, no green light came on in the hub, and the mouse and keyboard were unresponsive. I unplugged everything and went through the entire process again, this time powering the Pi with the hub, and everything worked fine. I was able to select and install the Raspbian OS. However, after the Recovery Mode was finished installing the OS and restarted the Pi, bringing up Raspi-config, the green light in my hub turned off for the combo, and both devices became unresponsive again. I left it alone for 30 seconds to a minute in hopes of fixing itself somehow, but nothing. I again unplugged everything and started over, following the same steps, but this time, nothing happened at all. I repeated the process several times, and one time the Pi responded to my keystrokes about 30 seconds late each time. Other than that, my combo was left completely and totally unresponsive. Anyone have any ideas as to what is going on?

[FTrevorGowen]

First suspect is PSU issues. What are the specs. of the PSU's ? You refer to "a power source the USB hub" - are you using a separate power source for the hub and (another) one for the Pi or are you powering the Pi from the hub? What do the Pi's LED's "do"?
Trev.

[rgatch2857]

My power source came with the USB hub, it is 5V and 2.6A. It was powering my keyboard and mouse fine.

[rgatch2857]

Also, I ran my Pi with the PSU that came with it, and I even tried to run it with an iPad charger rated at 2000mA and 5V. Still the same issues.

[gsh]

It could be a problem with the hub back powering the Pi... This is difficult to stop happening without using a special cable (you need to cut the red wire!)

Unfortunately that's a problem with cheap hubs you buy from China, they cut the costs so much that one extra diode is removed!

If it's not that... You say the green light doesn't light, are you sure it doesn't flash at all? The green light is just to indicate SDCard activity, if there's no activity it won't flash...

If not then the problem is the SDCard is not being read correctly, try reseating the SDCard and holding it against the PCB when you power it (the idea is to push it against the little connections in the connector)...

Finally what happens if you unplug the keyboard and mouse, does it boot up at all?

Or does it always boot correctly, you're just having trouble using the keyboard / mouse combination... In which case try the next branch

sudo BRANCH=next rpi-update

That has some new fixes for USB

Gordon