So I have a 512mb model b pi that seems to have stopped working while I was away at work last week.
This was a replacement modmypi sent me after a SD card adaptor from them broke the SD card holder on a previous pi and this pi is about a year or so.
I tried to fire up the pi to run osmc and plug in the i2c DAC to the HiFi however it won't boot. I either have no lights or a very dim power light. I have tried different PSU's and USB cables that I know work but there is no change in the behavior of the pi.
I hooked up the multimeter to it to check the voltage over the test points and this is where it is a little odd.
With no SD card inserted I get a reading of 4.2 to 4.4v with any PSU. Drop a SD card in and the voltage goes to 7.4v then down to 6.3v then to around 3.8/3.3v before the power light goes out and the voltage reading goes to pretty much zero. I also note that, unsurprisingly the CPU/ram package is VERY hot to touch during this and that the capacitor by the power port sometimes gets quite hot too, but inconsistently.
Any ideas what can be the cause of this? There have been no power issues over the week that I'm aware of and I can see Jo sign of damage to the pi's PCB or any of the components on it.