평판: 11
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hi
i have one imac a 1224 and non video on the screen
The diagnostic led on the logic board are
1on, 2 on 3 on but there isn't install the video card
because the led 3 is every on
my logic board is dead?
please answare me
dear Silvano
좋은 질문 입니까?
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LED Startup Sequence
LED #1 = Power available.
If no LED is visible:
• Verify AC source
• Verify known-good AC cable is connected
• Verify cable connection between AC inlet and power supply
• Verify cable connection between power supply and logic board
• Verify power supply
LED #1 + LED #2 = Power available, and system is powered on.
If second LED is not visible when power button is pressed:
• Verify power button connection to logic board
• Verify power button functionality
• Verify cable connection between power supply and logic board
• Verify power supply
• Verify logic board
LED #1 + LED #2 + LED #3 = Power available, system is powered on, and video card found.
If third LED is not visible after power on:
• Verify that MXM video card is seated properly
• Verify logic board
해당 답변은 도움이 되었습니까?
Hook it up to an external monitor with the video card in and see what you get.
평판: 11
1
3
hi
but on my logic board the led 3 is every on when i press the power button
but the video card isn't install?
thanks Silvano
해당 답변은 도움이 되었습니까?
so, you are saying that you do not have the videocard installed on the logic board and the third LED is coming on. then your logic board is possibly dead. if you install the video card, does LED 3 come on? do you see video?
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