Sony vaio blank screen

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Hello,
Please help me I am using Sony vaio svf15218snb with Windows 8.1. When I press power button vaio logo not coming but fan lights are on. No boot only black screen.


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Try this

1. Remove the battery and cable.

2. Press and hold the power button for 58 seconds.

3. Replug and start.

Good luck
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Did but not working
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Plz help
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Did but not working
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Try connecting to an external monitor to see if you get a signal.
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I connected to lcd through hdmi but same blank screen on lcd
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Lcd shows connection but it also have blank screen
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Make sure your graphic card is well seated into the slot.

Make sure your ram stick are clean.

If the above does not work, you may have a circuit issue which only a qualified technician can attend to.

Regards