Hi Glenn,
A while back, I repaired a roach2 problem that had similar symptoms.
Its probably not terribly likely that yours has the same problem, but I
thought I'd share in case...
The short story is that a capacitor (C163) failed and I could measure
~220ohms across it. This particular cap is part of the soft reset
circuitry associated with switch S1, and was pulling down the signal,
holding the roach2 in reset.
I removed that capacitor and saw pretty major evidence of re-work in
that area (missing pads & traces, small wires from nearby vias, etc).
We never use the soft reset switch on the board, so I just removed all
of those parts and the roach2 board now functions as it should.
Good luck!
Jason
On 5/5/2017 4:45 PM, G Jones wrote:
Hi,
Our ROACH2 suddenly failed recently. The symptom is that it won't
power on. The green AUX power LED is on and the red FAULT LED is on.
Pressing the power button and the reset button does nothing.
Looking back at the archives, I see that the standard ROACH2 power
supply is known to fail after overheating. Is this a symptom of that
failure? I will try another power supply shortly, but I'm curious if
others have seen this symptom before.
Thanks,
Glenn
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