IBM 8863 Service Guide - Page 61

Power problems v Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved. v See Chapter 3, "Parts listing, Type 8863," on page 93 to determine which components are customer replaceable units (CRU) and which components are field replaceable units (FRU). v If an action step is preceded by "(Trained service technician only)", that step must be performed only by a trained service technician. Symptom Action The power-on button does not 1. Make sure that the operator information panel power-control button is working work, and the reset button does correctly: work (the server does not turn on). a. Disconnect the server power cords. Note: The power button will not b. Reconnect the power cords. function until 20 seconds after c. (Trained service technician only) Reseat the operator information panel ac power has been applied to cables, and then repeat steps 1a and 1b. the server. v (Trained service technician only) If the server turns on, reseat the operator information panel. If the problem persists, replace the operator information panel. v If the server does not turn on, bypass the operator information panel power-control button by using the force power-on jumper (see "I/O board internal connectors and jumpers" on page 8); if the server turns on, reseat the operator information panel. If the problem persists, replace the operator information panel. 2. Make sure that the reset button is working correctly: a. Disconnect the server power cords. b. Reconnect the power cords. c. (Trained service technician only) Reseat the light path panel cable, and then repeat steps 1a and 1b. v (Trained service technician only) If the server turns on, replace the light path panel. v If the server does not turn on, go to step 3. 3. Make sure that: v The power cords are correctly connected to the server and to a working electrical outlet. v The type of memory that is installed is correct. v The memory card is fully seated. v The LEDs on the power supply do not indicate a problem. v The microprocessors are installed in the correct sequence. 4. Reseat the following components: a. Memory card b. (Trained service technician only) Power switch connector c. (Trained service technician only) Power backplane d. I/O board 5. Replace the components listed in step 4 one at a time, in the order shown, restarting the server each time. 6. If you just installed an optional device, remove it, and restart the server. If the server now turns on, you might have installed more devices than the power supply supports. 7. See "Power-supply LEDs" on page 55. 8. See "Solving undetermined problems" on page 91. Chapter 2. Diagnostics 45