Table 2. Light path diagnostics panel LEDs (continued)v Follow the suggested actions in the order in which they are listed in the Action column until the problemis solved.v See Chapter 3, "Parts listing", in the Problem Determination and Service Guide to determine whichcomponents are customer replaceable units (CRU) and which components are field replaceable units(FRU).v If a action step is preceded by "(Trained service technician only)," that step must be performed only by atrained service technician.LED Description ActionOVER SPEC(Continued)The power supplies are usingmore power than their maximumrating.If the 12 V channel C error LED is lit, complete the followingsteps:1. Turn off the server and disconnect the power from theserver.2. Remove the SAS/SATA RAID riser card, DIMMs inconnectors 1 through 8, and the microprocessor in socket1.Note: The server will not power-on when themicroprocessor in socket 1 or 2 is not installed in theserver. Do the following, depending on the level of yoursystem board:v For the pass 8 level system board, (trained servicetechnician only) toggle the switch block (SW4), bit 8 toallow the server to power-on. See Table 5 on page 40for the location of the SW4 switch block on the pass 8level system board.v For the pass 9 level system board, (trained servicetechnician only) toggle the switch block (SW4), bit 3 toallow the server to power-on. See Table 8 on page 43for the location of the SW4 switch block on the pass 9level system board.3. Restart the server to see whether the problem remains.4. Reinstall each device that you removed in step 2 one at atime, starting the server each time, to isolate the failingdevice.5. Replace any failing device.6. (Trained service technician only) Replace the systemboard.(Continued on the next page.)Chapter 1. The System x3550 M2 server 19
