I'm using a RPi B v2.0 ("Made in the UK" with the P5 connector). I've installed Raspbian to an 8GB SDHC class 4 card and can boot (the display shows nice boot log). When measuring between TP1 and TP2, 4.9V are displayed (without SD card and not connected to the monitor 5.0V are displayed). This voltage does not change when I connect my Cherry G230 keyboard (labeled with 5V max 40mA). This 5V/2A PSU is used.
It's booting until the configuration screen of Raspbian, but no matter what key I press nothing happens, not even the LEDs (Caps, Num, Scroll) can be toggled. After approx. 2min (no matter whether the keyboard is plugged in or not) a red-orange square is shown in the top-right corner of the screen (over-heat indicator?). I've also tried a different remote keyboard which, as the above mentioned Cherry one works fine on another RPi B+, but to no avail.
Is there some way to configure the Raspbian on a PC or using a RPi B+, so I don't need an keyboard any more, but can do further stuff using SSH?