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Guide di riparazione e informazioni per il disassemblaggio per i laptop prodotti da ASUS.

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Keboard failure on MB reinstall Asus zenbook

Hello all,

I have an asus zenbook ux305CA. The motherboard on the machine failed about 2 years into ownership. The symptoms of the failure were fail to attempt to post and failure of any of the LED lights on the external machine to light up when connected to power. It seemed to fail randomly one day, though I did spill a very small amount of water on the keyboard prior to it failing.

I replaced the MB with a replacement from EBAY. However, the replacement board had two missing flaps on ribbon connects. The two connector for the keyboard and mouse. So, I tried my best to transfer the flaps for the ribbon cables over to the new board but broke off the hinges on both of them due to their fragile nature and my lack of knowing how to remove them from the ribbon cable connection on my old board. I stuck the ribbon cables into the connectors and the flaps over them the best I could.

The laptop power button (to my disliking) is a part of the main keyboard on this model and not a separate button.

The laptop booted on it's own after I first plugged it in, and the trackpad worked, but I could not type at all to log into windows. I shut down the machine and opened it back up trying to rig a fix for the connection for the keyboard. I tried to some silicon putty to lodge between the case and the connection which seemed like it should put a good amount of pressure on the cable to hold it in place, but no joy.

Looking closely at the connection, it seems like it is fairly solid in spite of the flap being broken. I tried to think of another way to rig something in there but haven't though of much that could work.

I'm wondering if somehow the laptop's keyboard has also failed or if it is just the connection. Now, of course the laptop won't power on since the power button is on the non-functioning keyboard. I think I could get it to boot again by resetting the cmos and using an external keyboard, but I use this laptop to go to work and that is not a practical solution.

Does anyone know if there is a way to test if the keyboard is bad other than trying to order a new one? I guess I could try to get my money back from the ebay seller since they sent me a faulty MB, but they did sell it for only $70 and it's usually around $200, so I would still have to cough up some cash to find a better board.

Here is a link showing a teardown of the laptop and here are some close up pictures of the suspected bad connection: http://www.myfixguide.com/manual/asus-ze...

[img]https://www.dropbox.com/s/m7wbnrglqv2idh...[/img]

[img]https://www.dropbox.com/s/pm11gr1i099qx3...[/img]

[img]https://www.dropbox.com/s/y3beewb9jioqw9...[/img]

Any help or ideas appreciate.

Thank you.

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Thank you for your reply.

I was able to rig up a thin piece of plastic as you described into the zero insertion force (ZIF) connector, and it seemed to be holding good downward pressure onto the keyboard ribbon cable.

[image|1497185]

[image|1497181]

[image|1497182]

[image|1497183]

[image|1497186]

However, now the laptop will no longer power on after removing the cmos battery and none of the external LED will light up when connected to power, which is the same symptoms that it had before I replaced the MB. I'm worried that I have somewhat killed this MB in the process of messing around trying to get this connection to work. I looked over everything on the board and don't see any signs of damage.

da

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Soluzione Prescelta

The pictures show a Zero Insertion Force connector. The part you call the flap is used to put tension on the cable connectors. The trick is to align the cable end so that it fits squarely in the connector, if the cable is a bit off then the pins do not match up. If the flap is broken off completely then you might be able to use thin light card stock to help hold it in place. You can add tape, but look for tape that maintain adhesiveness without leaving a gooey mess or dry up like duct tape. Glues are not a good idea in this area because it could act to insulate one of the pins in the connector.

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The power key on the keyboard makes a kind of crunchy sound that it never made before the laptop died. I think this was the area that I spilt a small amount of water before the laptop died. Could the keyboard could be bad and somehow have killed the new MB once connected?

I was going to take out the keyboard to further examine it but I can't really see how it comes out of the laptop. I looked at some replacements online and they are pretty cheap ($25) but I'm not sure how hard it is to replace. I'm also worried I've killed the new MB somehow and need another new MB to work with.

[image|1497184]

https://www.any-pc-part.com/product_info...

I reviewed this guide, although for a similar looking machine did not really show how to get beyond where I am in taking apart the laptop.

Asus Zenbook UX303L Keyboard Replacement

da

I eventually decided to delve a little deeper and try to take out the keyboard from this machine to see if I could find an issue there for why it would no longer even turn on.

After removing every screw and piece that I could I found that the keyboard is sort of riveted in place with these plastic little rivets. I started prying off the keyboard to try to remove it, focusing my efforts up near the power button since I thought there may be an issue in that area. After prying that area up, I looked at the power button and it seemed to be working fine, so I gave up and decided to reassemble the machine and put it aside.

I put the keyboard ribbon cable back into that ZIF connector with my little piece of plastic as shown above. After complete reassemble, much to my surprise the machine now works perfectly. I have no explanation still for why it didn't work at all after I first tried the little plastic rigging mechanism, but after taking it all apart and putting it all back together it is working now just fine.

da

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Tyler Barr sarà eternamente grato.
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