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apt-get update apt-get upgrade
It did during the week, and the first opportunity I got to power it up was the last half an hour of work on Friday when everything else was wrapped up and I had nothing else to do. Put together the following:
* Existing USB power supply (Maplins 2.1A output for USB, have been using this successfully ever since I got my B)
* Existing Amazon HDMI cable
* Existing Raspbian microSD (created/tested with the B, as mentioned)
* New Zero
* New microHDMI adaptor from the Zero package
* New USB micro-to-A adaptor from the Zero package
Plugged in a keyboard/mouse dual unit from the workbench into the USB adaptor and plugged the HDMI into one of the bench's monitors (about the only one we've got with a HDMI input on it). Switched on the power, and success: the Zero started the boot process and reached the Raspbian desktop. I then tried to move the mouse - nothing.
I've tried a dual keyboard/mouse unit, a wired laser mouse on it's own, a wireless mini keyboard with a trackpad built into it (that works fine with my B), a different keyboard on it's own, and I've basically whittled the possibilities down to exactly two:
* The Zero's USB port is DOA
* The USB adaptor is DOA
I don't have either of the aforementioned items in spares, so I'm wondering how I can remove one of these two possibilities. I read somewhere the Zero can work as an OTG device to a PC but though I can do the physical setup for this with known good cables, I'm not exactly sure of what procedure I should be following to do this. Any suggestions/ideas?