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Versione corrente di: oldturkey03 ,

Testo:

-ariec 7 makes me wonder if ED 2 does not come on because your computer does not come on.
+ariec 7 makes me wonder if LED 2 does not come on because your computer does not come on.
'''LED #2 -''' Indicates the main logic board has detected proper power from the power supply '''when the computer is turned on.''' This LED '''will be ON when the computer is turned on''' and the power supply is working correctly.
-Check this with empasize on #5 and#6
+Check this with emphasis on #5 and#6
1. Power ON system. Verify if there is any indication that the system has powered up (fan rotation, hard drive or optical drive noise, backlight turns on).
Yes The symptom is powering up.
Jump to Won’t Start Up.
No Go to step 2.
2. Remove front bezel and locate diagnostic LED’s on logic board. Plug power cord into system. Verify whether diagnostic LED #1 turns ON.
Yes
Trickle voltage being supplied by power supply. Go to step 3.
No
Replace power supply.
3. Press power button while monitoring diagnostic LED’s. Does diagnostic LED #2 turn ON and remain ON after pressing the power button?
Yes
Power supply functioning and logic board detects supply voltages. Jump to Won’t Start Up.
No
Go to step 5.
4. Disconnect power then remove power supply and carefully inspect AC inlet and DC output connectors and cables for damage or poor connections. Were any problems identified?
Yes
Replace damaged part.
No
Go to step 5.
5. Inspect power button and verify that it is properly connected to the logic board.
Yes
Visual inspection OK.
Go to step 6.
No
Reconnect power button. Replace rear housing (which includes power button) or logic board if damage is present.
6. Disconnect power button from logic board and verify continuity between two pins when power button is pressed.
Yes
Power button is functioning correctly. Go to step 7.
No
Power button faulty. Replace rear housing which includes power button.
7. Press power button and verify whether system turns ON.
Yes
Power supply is functioning. If system still does not boot jump to Won’t Start Up.
No
Replace power supply. Retest.
If No Power symptom persists after all steps have been followed use Minimum Configuration troubleshooting to proceed. Try disconnecting the hard drive, optical drive, AirPort, and Bluetooth modules to determine if one of them is preventing the power supply from functioning.
Let us know what 820-XXXX your logic board is. There may be a way to try to use power-on pads to see if it comes on.

Stato:

open

Post originale di: oldturkey03 ,

Testo:

ariec 7 makes me wonder if ED 2 does not come on because your computer does not come on.

'''LED #2 -''' Indicates the main logic board has detected proper power from the power supply '''when the computer is turned on.''' This LED '''will be ON when the computer is turned on''' and the power supply is working correctly.

Check this with empasize on #5 and#6

1. Power ON system. Verify if there is any indication that the system has powered up (fan rotation, hard drive or optical drive noise, backlight turns on).

Yes The symptom is powering up.

Jump to Won’t Start Up.

No Go to step 2.

2. Remove front bezel and locate diagnostic LED’s on logic board. Plug power cord into system.  Verify whether diagnostic LED #1 turns ON.

Yes

Trickle voltage being supplied by power supply. Go to step 3.

No

Replace power supply.

3. Press power button while monitoring diagnostic LED’s. Does diagnostic LED #2 turn ON and remain ON after pressing the power button?

Yes

Power supply functioning and logic board detects supply voltages. Jump to Won’t Start Up.

No

Go to step 5.

4. Disconnect power then remove power supply and carefully inspect AC inlet and DC output connectors and cables for damage or poor connections. Were any problems identified?

Yes

Replace damaged part.

No

Go to step 5.

5. Inspect power button and verify that it is properly connected to the logic board.

Yes

Visual inspection OK.

Go to step 6.

No

Reconnect power button. Replace rear housing (which includes power button) or logic board if damage is present.

6. Disconnect power button from logic board and verify continuity between two pins when power button is pressed.

Yes

Power button is functioning correctly. Go to step 7.

No

Power button faulty. Replace rear housing which includes power button.

7. Press power button and verify whether system turns ON.

Yes

Power supply is functioning.  If system still does not boot jump to Won’t Start Up.

No

Replace power supply. Retest.

If No Power symptom persists after all steps have been followed use Minimum Configuration troubleshooting to proceed. Try disconnecting the hard drive, optical drive, AirPort, and Bluetooth modules to determine if one of them is preventing the power supply from functioning.

Let us know what 820-XXXX your logic board is. There may be a way to try to use power-on pads to see if it comes on.

Stato:

open