Hi Sara,
This sounds like a failure mode with the roach in which the 1V supply is
disabled, due to a failed mosfet (Q13) on the board. We've seen this
problem several times and can repair them in Green Bank. We repaired
this exact problem on one of the mustang 1.5 roaches for Justus about a
year ago.
Thanks,
Jason
On 11/20/2014 3:03 PM, SARA STANCHFIELD wrote:
Hi all,
We're having an issue at UPenn with not being able to start up one of
our ROACHes. When we power it up the lights on the fan flashes 4 times
while the green light on the front panel flashes. Also CR1 & 2 flash
at this time, when the fan lights stop flashing, the green front panel
light keeps flashing and the red LED starts flashing as well.
I was able to run roach_monitor.py and the system says that it has 0V
on the ATX (I attached the output of retrieve details), but we have
tried both a power supply that we know works on another ROACH and also
a regular ATX power supply and saw no change.
If anyone has any experience with this issue or suggestions of what to
do your input would be appreciated.
Thanks!
Sara Stanchfield
Graduate Student
University of Pennsylvania
