I am a reseller and I have 2 servers that just started having problems. Both were installed around the same timeframe (January and February of 2015). Both are P4308CP4MHGC and are having power issues.
I tried swapping (redundant) power supplies from server 1 to server 2 and had the same result explained above. I tried swapping power supplies from server 2 to server 1 and had the same result explained above.
I believe both of these are bad motherboards.
I need at least one of these to get started as soon as possible as it is a mission critical for a business. I can use one for parts to get the other running if needed.