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Document ID: MCGN-45VSZQ

Netfinity 5500 M20 - Power supply LED errors

Applicable to: World-Wide

Source: Hardware Maintenance Manual

Power Supply LED Errors
Use the power supply LED information on the following page to trouble shoot power supply problems.

Note The minimum configuration required for the DC Good light to come on is.: Power Supply Power Backplane System Board (With pins 2 and 3 on J32's extension cable connected together to bypass the power switch; see "System board component locations"). Processor Board (Verify that the J32, J33, and J35 connectors are installed correctly; see "Processor board component locations").

Table 19 Power Supply LED Errors

AC Good LED	DC Good LED	Description	FRU/Action
Off	Off	No power to system or AC problem.	1. Check AC power to system 2. Power Supply 3. Power Backplane 4. Power AC Inlet Box
On	Off	Standby mode or DC problem.	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
On	On	Power is Okay	N/A

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	Document Category	Diagnostics
	Date Created	11-03-99
	Last Updated	16-03-99
	Revision Date	26-05-2000
	Brand	IBM PC Server
	Product Family	Netfinity 5500 M20
	Machine Type	8662
	Model	All
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