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I have exactly the same problem after replacing the caps. Did you manage to get this working? I get LED1 and LED2 and even the front light. Going to try adapter for external monitor but have not tried yet. CPU gets hot so it's doing something but the screen is black, no faint image either, and LED 3 does not light up.
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I was advised that it could be defective RAM or a GPU problem which would need reflowing. I haven't quite got round to either of those solutions but apparently it's quite well known.
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LED 1 indicates that trickle voltage from the power supply has been detected. This LED will be ON when the computer is turned off and your power supply is working correctly.
LED 2 indicates that 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.
LED 3 indicates that the computer and the LCD display are communicating. This LED will be ON when the computer is turned on and video signal is being generated.
LED 4 lights only if the computer detects an over-temperature condition. This LED will be OFF when the computer is turned on and running at the correct temperature.
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Anybody had any luck fixing this yet? I have the same problem...white light..chime...2 flashing LEDs...No display?
- de v3z