I bought a FG085 from Sparkfun a while ago and I just assembled it yesterday. I was able to power it up and it seemed to be working fine for about 2 minutes (I could see the SINE wave menu on the display), when all of a sudden the backlight started getting dimmer and soon the whole board went dead. I could hear a small humming sound from the board while it was working.
After it went dead, I checked the voltages and find that the output of the regulator U2 at TP12 is only 0.45 volts now however VRAW is around 15V and V+ and V- are at 14V and -13V at TP14 and TP13 respectively. Could you suggest any way to get the board working again or to find out which component is damaged?
My board revision is 109-08500-00G