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Laptop doesn't start after pressing the power button

Hi All,

We have bought our second hand Dell XPS 17" L702X. When we bought it, we know there is a problem to start. The problem was you have to press the power button many times in order to start the laptop. Basically, we had to press the power button 20 times or so in order to start the laptop. Once the laptop is started, that's fine to use.

Now, this laptop simply doesn't start after pressing the power button 300 times or so.

Every time we press the power button, we hear one clicking sound which sounds like from the hard-drive. That's it and it never starts up.

What is the best option should I look into?

Thank you.

Dennis

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Hi,

Does the laptop start if you have the charger connected and switched on?

You state that you have to press the Power button 300+ times and it still doesn’t start.

By this I take it to mean that nothing happens, no lights, no fan noise, nothing at all, except the one click, is this correct?

If this is the case, then I suggest that you start with the Power button, to prove that it is OK or connected OK to the systemboard.

Here’s a link to the service manual for your laptop.

Scroll to p.47 to view the necessary pre-requisite steps and then the procedure to remove the Power button board.

Once you have isolated it from the systemboard you may be able to test if the button itself is operating OK by testing it with an Ohmmeter to prove electrical continuity through the button when it is operated.

If the button is faulty, replacements are available online, just search for Dell XPS 17" L702X Power button board part to get results for suppliers of the part.

Alternatively you could always strip back the laptop to a barebones system, i.e. no HDD or DVD drive or external USB etc, just RAM and laptop components and try to start the laptop in case there is a power problem with either drive that is shutting down the system.

If it starts OK you will get an error message regarding no OS found or something similar but at least you’ve narrowed down the problem.

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No, it doesn't work. I've changed the Power button board and I have the same problem.

Basically, it is the same problem of having one clicking noise on the CDROM every time I press the power button no matter I have the charger connected or simply using the battery (or without). Yes, no lights, no fan noise, nothing at all, except one click on the CDROM. The light on the power button does flash once too. I've stripped back the laptop to a barebones system with no HDD or DVD drive or external devices or RAM. It is the same.

von

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Dennis Tam wird auf ewig dankbar sein.
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