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원문 게시자: Steven ,

본문:

Eveans,

Disconnect power supply cable from logic board. Verify cable voltage at connector between Pin 1 and chassis ground (GND) is 14.3–15.8 VDC. No power or incorrect power to logic board. Most likely:Replace power supply. If the power checks out do the following steps..

Disconnect all connectors from the logic board EXCEPT the power supply cable. Verify voltages on logic board between test points TP61 (3.3VDC) and chassis ground (GND) is 3.1–3.5 VDC, and between TP13 (12VDC) and chassis ground (GND) is 11.4–12.6 VDC. IfPower supply OK.

Suspect possible short, damaged connector, or faulty sensor/ fan/speaker. Reconnect connectors one at a time and retest for 3.3VDC at TP61 and 12VDC at TP13. Replace affected part that causes the 3.3VDC or 12VDC voltages to disappear. If everything checks out ok, Replace logic board.

here is the link to go with the steps. It will have a pic of the logic board and spots to check.

[image|57536|size=thumbnail]

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