Recently I've bought a Sony Reader PRS-600 and an HP iPaq which charge via USB.
At times, I can't make it start recharging when it's connected to the computer. The indicator on my Reader lights up and the icon in the system tray appears. They both show that the Reader is plugged in. However, the device should start recharging and allow me to browse through the files. But it doesn't.
This happens on both my desktop and laptop, both running XP SP3. What interest me is that occasionally I can I just plug them in and they work properly.
There are even some computers (I have tested quite a few possibilities) on which the problem does not appear!
My question is are there any tools that could help me diagnose USB ports? Or maybe someone knows the solution?
I have a lot experience with low level programming (mostly from the times of MS-DOS applications), but I'm not an expert when it comes to Windows XP. I know how to track network traffic, but with USB ports I feel powerless.
I have a feeling that the problem may lie in the way WinXP handles USB devices. I know that somebody will suggest to move to Linux or other *Nix system, but XP is a major part of my professional life. Besides, I don't consider XP as a total disaster.
Any help from you will be appreciated!