Hi,
well, also this old POWER7+ Server is aging...also the components. From a Firmware point of view there is no direct issue for occuring 11002700, there are some fixes regarding wrong callouts (11002630) but usually, when a VRM is faulty, it is faulty. Latest System FW is AM780_100_100. I assume you have no Hardware Maintenance contract, otherwise I can only recommend to open a Hardware Ticket.
Greetings
Marc-Eric
------------------------------
Marc-Eric Kahle
------------------------------