Make sure your ribbon cables are tight to that module and make sure the backplane is snug into the hash boards.
Check the power cable for that module also, inspect the connectors on both ends for any evidence of heating due to poor connections.
If the cables are ok inspect the module for burnt capacitors in the defective miner sections.
If you have a meter you can compare the C1 voltage readings between miner sections.
C1 - 680uf - is also the capacitor that has been failing on some of the units.
A late reply, but better late than never, thanks for the advice it was a loose backplane.. I actually fixed it by turning the unit on the side (I have since seated it properly).
Another question from me :-)
I have added the fourth module into my batch #2 Avalon and upgraded the PSU to a OCZ 1250W.
Since adding the fourth module and running --Avalon-auto I get a fairly high HW error rate at 344 Mhz (>2.5 %) but dropping down to 319/320 gives me 1.5%.
However CGMiner is restarting itself every 6 - 9 hours.
Running firmware version '20130923'
Temp1 - 20
Temp2 - 48
Temp3 - 45
I've moved the PSU out of the case incase it was pushing too much hot air onto some chips but no difference.
Does anywhere know where I can see some logs of why CGMiner is crashing?
Thanks,
nox_
