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3.3.4 Memory Boards (MMEM, EMEM, PMEM, QMEM) Refer to the configuration table (subsections 2.2.2 through 2.2.27) for your module and verify the memory boards are in the correct slots. Also check each memory board for proper compatibility and relationship to other memory boards. Refer to Table 2-5. PASS MOD TEST (green) does not light on one board. • See if board works in another chassis slot. • Replace MMEM, EMEM, PMEM, or QMEM. • Replace HMPU, HPK2, K2LCN, or K4LCN. MULT BIT ERR is lit on MMEM, EMEM, PMEM, or QMEM, and DTAK TIME OUT and BUS ERR are lit on EMPU, HMPU, HPK2, or just MULT BIT ERR and BUS ERR are on. • Replace MMEM, EMEM, PMEM, or QMEM. • Replace HMPU, HPK2, K2LCN or K4LCN. SING BIT ERR is lit. • Replace MMEM, EMEM, PMEM, or QMEM. • Replace HMPU, HPK2, K2LCN, or K4LCN. MULT BIT ERR is lit on MMEM, EMEM, PMEM, or QMEM and DTAK TIME OUT is lit on EMPU, HMPU, HPK2, K2LCN, or K4LCN, but BUS ERR is not on. • Replace MMEM, EMEM, PMEM, or QMEM. • Look for a BUS TRAN ERR light on a controller board, and replace that board. • Replace HMPU, HPK2, K2LCN, or K4LCN. 3.3.5 Processor Boards (EMPU, HMPU, HPK2, K2LCN, or K4LCN) DATA PAR ERR and BUS ERR are lit on EMPU, HMPU, HPK2, K2LCN, or K4LCN. • Check the alphanumeric display. The first two characters denote the slot number of the failed board. (The third is the failed test number.) • Replace indicated board. • Replace HMPU, HPK2, K2LCN, or K4LCN.