S1200V3RPO board in R1304RPOSHBN server won't boot. Diagnostic LED code is 0x2B. All documentation seems to lump all codes between 0x19 and 0x31 as MRC Process Codes or MRC Progress Codes but does not show any further detail. Is 0x2B the last MRC code, meaning it's halting on 0x31, which is labeled as Memory Installed? Or is there an unlisted 0x2C that would indicate some other error? Blank screen. Loud fans. No interaction other than reading 0x2B LED code every time.
Our recommendation is taking the system to a minimal configuration (1 memory on slot A1, CPU, board) and start swapping components until you determine which is the faulty one.
Test the board without any memory installed looking for beep codes.