IBM 86626RY Hardware Maintenance Manual - Page 311
Table 19 of 2. Power supply LED errors, FRU/Action, Check processor board cable connectors J32
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Netfinity 5500 M20 - Type 8662 303 Table 19 (Page 2 of 2). Power supply LED errors AC Good LED DC Good LED Description On Off Standby mode or dc problem. On On Power is OK FRU/Action 1. Check processor board cable connectors J32, J33, and J35. 2. Move jumper on J32's extension cable to pins 2-3 to bypass power control. If the DC Good LED comes on, press Ctrl+Alt+Delete. Watch the screen for any POST errors. Check the System Error Log for any listed problems. If the system powers up with no errors: a. Power Switch Assembly b. System Board 3. Remove the adapters and disconnect the cables and power connectors to all internal and external devices. Power-on the system. If the DC Good LED comes on, replace the adapters and devices one at a time until you isolate the problem. 4. Power Supply 5. Power Backplane 6. System Board 7. Processor Board N/A