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ranamauro

Can't power on ASUS ROG GL502VS-DS71 Laptop

Question

The power button on my laptop started to become more and more unreliable in turning on the laptop. Usually this would start working after trying (sometimes 100 times), but now it has stopped working.

I can't seem to find details on the motherboard (presumably a 60NB0DD0-MB5000?), but was wondering if there may be pins I can short on the motherboard to power it on.

I'd also be interested in any troubleshooting recommendations, to see what may be the cause of the malfunction and what parts I may need to replace, and how, to get back into working conditions.
I did disassemble the laptop, got the motherboard off, but wasn't able to pry the keyboard from the plastic palmrest support.

Thanks!
mauro

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Posted (edited)

Not sure if your power button is located in the same spot or not but might want to see this:

If you end up doing that, make sure the battery is removed while you spray that and allow it ample time to evaporate.  I would spray that and work the button up and down a few times to see if it can help.

If that is your keyboard, you can always replace the entire keyboard to get it working again as seen here on ebay: https://www.ebay.com/itm/US-backlit-keyboard-for-Asus-Rog-GL502VM-GL502VS-GL502VT-GL502VY-Orange-WASD/152991545777?hash=item239f01b9b1:g:g8MAAOSwHUVa2sQP&frcectupt=true

If you do replace the keyboard you will basically have to fully disassemble this laptop.  Here is an iFixit disassembly for the screen.  You could stop at step 8 and then work on removing the motherboard.

 

Edited by Dr_Bob

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Thank you!! 

I had seen that video, but didn't really understand exactly where to spray, as I thought that doing it from the top, after removing the key cover, wouldn't get into the contacts... Aren't those sealed? 

I was able to disassemble and remove the motherboard (the ifixit instructions help, though the model has a layout that is a little different, it's similar enough :)) , but the keyboard seems attached to the palm rest using a large number of plastic pins that are pretty short, but hold on firmly to the metal frame of the keyboard as they seem to have been melted at their very top and are wider than the hole in the metal frame. 

Any suggestion on whether there are pins I can try shorting? 

I can post pictures if it helps. 

Thanks again for the help!!! ☺ 

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Might need pics but you may have to break those to free the keyboard from the palmrest.  You may be able to buy it all as one unit but it will be more expensive. 

I'm not sure on that model if the keys are sealed or not.  Any pics I see online make it hard to tell and I dont have one in my possession.

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Posted (edited)

Here are some pics. I actually can't imagine why they would do that, but I feel pretty confident that ASUS didn't build this to be replaceable, at least not on its own... :(

Note that I put a guitar pick in between the keyboard and the palm rest enclosure, and while it got in between, I couldn't really detach the two with reasonable amount of force :(

20190507_120752.thumb.jpg.efc9dbc529a079c704c311807f0f63f5.jpg20190507_120722.thumb.jpg.3b3ad95aa968760a4b38458a00e7c075.jpg

Edited by ranamauro

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Yea unfortunately they made this in a way that you are "supposed" to buy a new touchpad/keyboard assembly.  You can break those tabs and replace the keyboard.  I have successfully replaced one similarly that was tab bound.  It wont sit 100% as perfect as it does now but it is still pretty good and hard to tell you did anything after screwing it all back together.  Goes without saying but be careful not to damage the touchpad when doing so.

I linked some keyboard options if you plan to go the repair route, here is a site that I googled and found a complete touchpad and keyboard combo but unfortunately for the French layout so not sure if that will help.  At least it means they do have the combo for sale somewhere and maybe some more Google-fu would find one you can buy.  Obviously way more expensive to do it that way.  https://www.asus-accessories.com/gl502vs-74123-60105.htm

 

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I tried the spray, didn't help. I gutted the key, pics attached, not sure why it's not working.

What can I do to emulate what the press does and be sure that it makes the right contact?
The keyboard to motherboard connectors look super healthy, no dirt/gunk/spills that I could see anywhere. But the key looks clean too, so I am at a loss to understand why I can't power on.

20190509_110025.thumb.jpg.afa086a844c197d8bb4371821af608c3.jpg20190509_105912.thumb.jpg.482b84d46d161e1fef6d6c7776ef10fb.jpg

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Pushing that key should squish the rubber guy causing the metal below it to contact the electrical contacts below it, simulating a key press.  I would clean under that if you can to see if it will make connection then.  If you can see those contacts under it, you theoretically could short those out and it would be the same as pressing the button.

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I triedd eveyrthing I could to get the contacts to make a connection/short, the laptop does not power on. At this point i am starting to fear that the issue i am seeing has nothing to do with the power key, but is related to something else. I don't feel confident that a new keyboard will address my issue. What other throubleshooting steps could I take?

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So fun story true story, the power button ribbon connector is actually the brownish one with like 4 contacts on it.  If you see where that plugs into the motherboard you could short out the two pins for the power button and turn it on without the keyboard attached.  Not sure what else that ribbon connects but at least two of those leads are for the power button.

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