Here are some readings:
POWER_PB_B = 1.95v
PS_POR_PB_B = 3.3V
VSYS_IN = 12.273
VCC_5V0 = 0V
VCC_PSAUX = 0V
Pressing the on button raises VCC_5V0 to 5V and then it falls to 0.
Pressing the on button raises VCC_PSAUX to 0.8V and then it falls to 0.
These were just done with a meter, I can grab some scope readings from VCC_5V0 and VCC_PSAUX if that would be usefull?
How long have you had the board for? If you have had it for less then 60 days, I would suggest you contact your local Avnet office for an RMA as the product is still under warranty.
If you have had it for more then 60 days, I can do my best to help you trouble shoot.
Farnell in the UK have replaced it for me.
Haven't tried the replacement yet, fingers crossed!
Were you running anything intensive on the board when it failed? Was the fan running? This is the first failure like this I've heard of, my first thought is potentially thermal so I was curious about the run conditions.
Fan was running up to the point it died.
Nothing intensive was going on, linux was not running. I was testing out a PWM AIX component to one of the gpios and stepping through the code in the debugger over jtag.
there seems to be something similar maybe here: http://community.avnet.com/t5/Other-Avnet-Boards/Ultra96-board-won-t-power-up/td-p/19573
Is there no thermal cutoff ob the board?
I had in previous days used the gpio to turn the fan on and off, maximum fan off time would have been < 10 secs.
I am going to be attaching the design I am working on and to the fan signal in the coming days do I have to be aware that the board won't power down if temps get too hot?