Hi,
I'm working on the zedboard. Since today, I was able to run the Linux demo and the hardware seemed to work fine. But now, when I power up the board, the LD13 just don't light on. When I plug the micro-USB cable in J17 and J14 my PC still recognize the board so I assume that some power is delivered but I can't run the linux demo neither program the FPGA. I think that the issue is that PG-ALL is at a strange 0.7 V level. Jumpers are good. I suspected something wrong near IC29-LM339M:
V_IN1+ = 1V
V_IN1- = 0.9V
V_OUT1 = 5V **As expected
V_IN2+ = 1V
V_IN2- = 0.9V
V_OUT2 = 0.7 V ** I will have expected 5V
V_IN3+ = 0.7 V
V_IN3- = 2.97 V
V_OUT3 = 0 V ** Because V_OUT2 = 0.7V
V_IN4+ = 0.6 V
V_IN4- = 0.58 V
V_OUT4 = 0.7V ** On the same net of V_OUT2
As I will expected 5V at V_OUT2 for PG-ALL, I think that the problem might be a the comparator. Some of you experience this before? What did go wrong? Could someone confirm the voltages on IC29-LM339M?
Thank you
