digity wrote:Well I don't think its the SD card readers as I've probably inserted & removed SD cards less than 10 times for each RPi in the 1 year I've owned them.
Phil: Well in that case, its worth trying a few repeated insertions of the cards to 'wipe' the contacts, and then try again. It costs nothing to try.
'Plugs and Sockets' and 'Power Supplies' are the major problem points with hardware: another option is a deteriorating power supply or its contacts
resulting in a noisier power line: the potential wear on the power suppply socket is a 'major concern' of mine; problen avoidance says use a (Mains**) power socket with an inbuilt switch, so that Power-Off/ Power off Resets are achieved with no physical stress to the Pi
**UK terminology for AC Power Supply - not to be confused with Water in Pipes