IBM 8863 Service Guide - Page 67

Light path diagnostic LEDs The following tables describe the LEDs on the light path diagnostics panel and on the boards inside the server and suggested actions to correct the detected 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. Lit light path diagnostics LED with the system-error or system-information LED also lit Description Action All LEDs off (the power LED is lit; the information LED might be lit). No action necessary. OVERSPEC There is insufficient power to power the system. The NON RED and LOG LEDs might also be lit. 1. Add an optional power supply if only one power supply is installed. 2. Use 220 VAC input power. 3. Reseat the following components: a. Power supply b. (Trained service technician only) Power backplane 4. Replace the components listed in step 3 one at a time, in the order shown, restarting the server each time. 5. Use 220 VAC instead of 110 VAC. PS A power supply has failed or has 1. Reinstall the removed power supply. been removed; also see "Power-supply LEDs" on page 55. Note: In a redundant power 2. Check the individual power-supply LEDs to find the failing power supply. configuration, the dc power LED on 3. Reseat the following components: one power supply might be off. a. Failing power supply b. (Trained service technician only) Power backplane 4. Replace the components listed in step 3 one at a time, in the order shown, restarting the server each time. 5. If a 240 VA fault has occurred, ac power must be removed before dc power can be restored. LINK Reserved Chapter 2. Diagnostics 51