Hi Daniel,
All 4 nodes have the led cluster and none of them have PCIe cards installed. It is just below the bottom right motherboard screw securing the motherboard to the sled. It is not documented in the manual for some reason but it is there.
I have tried setting bother the system and CMOS reset jumpers to no effect. I have removed the battery and had the sled removed from the chassis for a couple of hours to no effect.
I have tried another slot and removing all the ram from the system both to no effect.
It would be good to find out what the led code means so I can confirm the cause of the error. Are you able to contact someone at the Data Center Solutions group and get the required information.
Thanks