Ziko, Tried different usb cable - not that. Device manager seems ok - entry in device usb hub correctly states 'picoscope 3000 series' (or something like that). I think you may be right about the usb 1.1 not being able to source sufficient current. I tried one last time yesterday and device started ...

Thanks for reply - in answer to your questions 1. usb port is NOT usb2.0 but 1.1 2. system is XP (with SP 3 loaded) and I have rights Will try another cable but I think I did this a couple of days ago. Is it ESSENTIAL to have usb 2.0? The other 3204s I have seem to work ok on other machines which on...

Hi, the probem I have is that I have a 3204 which will not communicate with the USB port on a particular PC. The software which came with the scope loads as if all is well but when I connect the scope to the USB I get the message 'cannot communicate with device' (I believe!). Have tried same scope a...