I have the same problem as in this iFixit post. I believe that the LEDS aren't present on this model- I cant find them anyway.
Can you tell me how to diagnose if it is a power supply unit fault?
Is this a good question?
Rep: 26.3k
152
71
50
The diagnostic LEDs to the right of the RAM slots (this may be covered by a piece of black electrical tape).
ED 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
When it shuts down pay attention to the diagnostic LEDs and the flow chart I posted in this thread. When it powers down if the first LED goes out it is a power supply problem. If the first light remains lit it is either something over heating or a memory issue. Please let us know what the LEDs are doing.
Was this answer helpful?
Rep: 685.3k
3.4k
1.1k
2.6k
The LEDs on this model are to the right of the RAM slots on the lower edge of the logic board. Many times they are covered up by a black piece of electrical tape. Just peel the tape off.
Was this answer helpful?
Past 24 Hours: 0
Past 7 Days: 0
Past 30 Days: 0
All Time: 443
