Hello The power distribution board on the T605 is not integrated into the system board. If you have already replaced the power supply units and the system board then the PDB would be the next likely component. Thanks
I've taken the machine to base config on 3 different motherboards, all 3 have the exact same error "E1231 1.2V HTCORE PwrGd and E123B Vldt PwrGd"   This post said it was the motherboard but I highly doubt 3 boards have the exact same error unless this is a very common error. I've tried move around and switching the power supplies, using one of the two proc's I have (2 opterons) and I have 32GB of Ram (8x4GB) and have switched them out and used KNOWN good RAM.  I'm at a loss, I called support but they wanted to charge 300 dollars for a one time TROUBLESHOOT...Any help will be MUCH appreciated.
E1231 - PowerEdge T605 - 3 Motherboards all same error?