I have found that some micro-usb connectors do not work and appear very loose - a slight upward pressure on the lead where it comes out of the micro-usb plug can persuade it to make decent contact.
I found, through trial and error, some leads with micro-usb plugs are a much firmer fit in the DV1 than others.. I am not saying this is your problem but if the plug does not feel firm in the DV1 socket, try an alternative lead/connector - it may solve the problem.