Question about Sony VAIO PCG-K23 Notebook

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Sony vaio pcg-7adp not turning On, checked voltage on power supply all good. No led lightining up just dead. Much appreciated if anyone can help. Thanks

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Plz try by removing the battery and switch it on, if the problem is persists then you have to take it to servicing centre

Posted on Nov 13, 2009

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If there is any way you can find another power supply that you know works and try it, this will be a really good troubleshooting step. If you know anyone anywhere that has a similar laptop. Or try your power supply on another computer that takes a similar power supply, to see if it works on a known good laptop. Also, try using your power supply on your laptop with the battery removed. If the battery is bad enough, it might make the laptop not boot, even though it is plugged in. If there is no other laptop or power supply available, you should at least be able to use a multimeter to test the output voltage of the power supply. The expected output voltage should be printed on the power supply.
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First get a known good power brick and try it.(Did you measure the voltage under load? Better not to even bother as it shouldn't be 23.5 anyway so discard the power brick before it blows something else up)
The excessive voltage may have fried the on board regulator or blown a fuse; you will need to dismantle to check this, just trace the wires from the power socket to the MB

I hope I have been of help but please do not hesitate to ask if you have any further questions.
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Plug the thing in and recharge the battery for about 6 hours then push the power button to turn the thing on.

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Are there any LEDs on it at all? If not then it is ver likely that your Power board finally failed. In which case, with this model, you must replace the motherboard.

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If power supply is supplying correct voltage, then you do not need power supply PCB.

Try starting the laptop with AC adapter and no battery, if battery is shorting out you may get same problem.

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