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Old 11-22-2019, 05:38 AM   #1
JG2018
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Default Asus UX510U issue with 8 keys on the Keyboard

Hello everyone,

I have an issue with an Asus UX510UWK Rev 2.0. The issue is that there are 8 letters that are not functioning at all, which are: 6, 7, y, u, h, j, n and m keys.

With an external keyboard it works perfectly. Boot on an Ubuntu bootable key, and have exact same issue (so i can assume it's not a software related issue)?

Already test another keyboard and i have the exact same issue (so not a keyboard issue). Cleaned the Keyboard FPC with IPA, changed nothing.

Checked closely the board, no water damage and nothing seems to be damaged.

Took off board the ENE IC (I/O), solder it back on the board, exact same issue.

I'm stuck..

Does anyone have any idea what can i test or check next?

Thanks in advance for your good advices.

Regards
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Old 11-22-2019, 06:32 AM   #2
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Have you checked continuity for all lines from EC to Keyboard flex? Maybe there's a broken/bent pin in the ffc connector.
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Old 11-22-2019, 04:07 PM   #3
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

What do you mean by EC?
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Old 11-22-2019, 04:18 PM   #4
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by JG2018 View Post
What do you mean by EC?
ENE IC (I/O) = EC/KBC/Super IO

The keyboard traces should go into it.
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Old 11-22-2019, 05:49 PM   #5
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Have token off board ENE IC, resolder back on board, but still exact same issue. All the pins of ENE IC seems to be ok (not broken or particularly bend) and did diode mode on each pins of ENE IC, all give values (have few line, maybe 6-7 which has continuity with ground but as i don't have schematics, i don't know if it's normal or not and therefore if it's the cause of the issue here). What do you think? Thanks.
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Old 11-23-2019, 04:55 PM   #6
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Here is my diode mode readings from pin right to left. I have weird value on pin 1 and 4 but don't know if it's normal? All the other pins gave .608 (have 1 GND on pin 6 and 2 OL on pin 2 and 3).
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Old 11-24-2019, 10:55 AM   #7
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Ok will upload a picture of Keyboard connector so you can see the traces. Pin 1 and 4 have traces while 2 and 3 seems to be unconnected pads.

Already cleaned inside of connector with a microscope, everything seems clear inside.
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Old 11-26-2019, 04:02 PM   #8
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Here the pictures of connector
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Old 11-28-2019, 04:31 AM   #9
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Any idea?
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Old 11-28-2019, 01:07 PM   #10
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Check connection with multimeter from the connector to EC but I think it is necessary to try to reprogram the EC

Last edited by jasko_jacker; 11-28-2019 at 01:16 PM..
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Old 11-28-2019, 05:05 PM   #11
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by jasko_jacker View Post
Check connection with multimeter from the connector to EC but I think it is necessary to try to reprogram the EC
How can i do that sir?

Already checked continuity from each pin of keyboard connector to ENE IC. Have continuity for each pin but not for the first 4 on the top of first picture.
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Old 11-28-2019, 05:07 PM   #12
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by JG2018 View Post
How can i do that sir?

Already checked continuity from each pin of keyboard connector to ENE IC. Have continuity for each pin but not for the first 4 on the top of first picture.
I means those 4 (the 2 in the middle i think they are not connected, so it's OL)
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Old 11-28-2019, 02:14 PM   #13
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Why does the board look so dirty or burned?
Anyways... Just do what I & jasko_jacker told you. Check for continuity from each pin on the connector to EC. Measure directly on the EC pins if possible.

Just put one probe on one pin of the connector and carefully swipe across the pins on the EC until your meter beeps. Be really careful to not bend any pins on the EC! Don't apply too much pressure with your probe. You've been warned..

I don't think that it will be necessary to reprogram the EC since everything else works fine and it would be odd if some keys won't work because of a messed up firmware..
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Old 11-28-2019, 05:09 PM   #14
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by KvnTM View Post
Why does the board look so dirty or burned?
Anyways... Just do what I & jasko_jacker told you. Check for continuity from each pin on the connector to EC. Measure directly on the EC pins if possible.

Just put one probe on one pin of the connector and carefully swipe across the pins on the EC until your meter beeps. Be really careful to not bend any pins on the EC! Don't apply too much pressure with your probe. You've been warned..

I don't think that it will be necessary to reprogram the EC since everything else works fine and it would be odd if some keys won't work because of a messed up firmware..
Already did that, as told in previous post Have continuity for each pin of keyboard connector, just not the 4 i put in last picture. 2 in the middle are OL (unconnected i think)
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Old 11-28-2019, 05:30 PM   #15
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by JG2018 View Post
Already did that, as told in previous post Have continuity for each pin of keyboard connector, just not the 4 i put in last picture. 2 in the middle are OL (unconnected i think)
Can you trace where they go ? Sadly there is no schematic for that board..
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Old 11-28-2019, 05:53 PM   #16
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by KvnTM View Post
Can you trace where they go ? Sadly there is no schematic for that board..
You mean the 4 pins not connected to ENE IC? Not really, can double check it but...
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Old 11-28-2019, 05:57 PM   #17
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Found this on Vinafix but wasn't able to open them
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Old 11-29-2019, 03:42 AM   #18
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by JG2018 View Post
You mean the 4 pins not connected to ENE IC? Not really, can double check it but...
Yes! I mean those. Double check them. Everything else seems to be ok.
Vinafix is a subscription based paid site. You can't download there for free.....
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Old 11-30-2019, 05:56 AM   #19
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Connector Pinout:
Pin 1: KSO7 => EC Pin 46
Pin 2: KSO0 => EC Pin 39
Pin 3: KSI1 => EC Pin 56
Pin 4: KSI7 => EC Pin 62
Pin 5: KSO9 => EC Pin 48
Pin 6: KSI6 => EC Pin 61
Pin 7: KSI5 => EC Pin 60
Pin 8: KSO3 => EC Pin 42
Pin 9: KSI4 => EC Pin 59
Pin 10: KSI2 => EC Pin 57
Pin 11: KSO1 => EC Pin 40
Pin 12: KSI3 => EC Pin 58
Pin 13: KSI0 => EC Pin 55
Pin 14: KSO13 => EC Pin 52
Pin 15: KSO5 => EC Pin 44
Pin 16: KSO2 => EC Pin 41
Pin 17: KSO4 => EC Pin 43
Pin 18: KSO8 => EC Pin 47
Pin 19: KSO6 => EC Pin 45
Pin 20: KSO11 => EC Pin 50
Pin 21: KSO10 => EC Pin 49
Pin 22: KSO12 => EC Pin 51
Pin 23: KSO14 => EC Pin 53
Pin 24: KSO15 => EC Pin 54
Pin 25: GND
Pin 26: PWR_SW#
Pin 27: CAP_LED_CON#
Pin 28: N/C
Pin 29: N/C
Pin 30: #5VSUS
Pin 31: GND
Pin 32: GND

Confirm those connections and measure directly from connector to ec and append your values to the list. Pin 25 - 32 Should be ok anyways. Pin 1 - 24 are important.
Pin 1 is marked on your board. Theres a small flipped 1 beneath the first pin.
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Old 11-30-2019, 06:00 PM   #20
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Default Re: Asus UX510U issue with 8 keys on the Keyboard

Quote:
Originally Posted by KvnTM View Post
Connector Pinout:
Pin 1: KSO7 => EC Pin 46
Pin 2: KSO0 => EC Pin 39
Pin 3: KSI1 => EC Pin 56
Pin 4: KSI7 => EC Pin 62
Pin 5: KSO9 => EC Pin 48
Pin 6: KSI6 => EC Pin 61
Pin 7: KSI5 => EC Pin 60
Pin 8: KSO3 => EC Pin 42
Pin 9: KSI4 => EC Pin 59
Pin 10: KSI2 => EC Pin 57
Pin 11: KSO1 => EC Pin 40
Pin 12: KSI3 => EC Pin 58
Pin 13: KSI0 => EC Pin 55
Pin 14: KSO13 => EC Pin 52
Pin 15: KSO5 => EC Pin 44
Pin 16: KSO2 => EC Pin 41
Pin 17: KSO4 => EC Pin 43
Pin 18: KSO8 => EC Pin 47
Pin 19: KSO6 => EC Pin 45
Pin 20: KSO11 => EC Pin 50
Pin 21: KSO10 => EC Pin 49
Pin 22: KSO12 => EC Pin 51
Pin 23: KSO14 => EC Pin 53
Pin 24: KSO15 => EC Pin 54
Pin 25: GND
Pin 26: PWR_SW#
Pin 27: CAP_LED_CON#
Pin 28: N/C
Pin 29: N/C
Pin 30: #5VSUS
Pin 31: GND
Pin 32: GND

Confirm those connections and measure directly from connector to ec and append your values to the list. Pin 25 - 32 Should be ok anyways. Pin 1 - 24 are important.
Pin 1 is marked on your board. Theres a small flipped 1 beneath the first pin.
Many thanks for your inputs.

Pin 1 to 26 have indeed continuity with ENE ic. Only pins 27 and 30 doesn't have continuity with ENE ic (and they also give different values than all others pins in diode mode).
Also as i don't have ENE IC schematics, i don't know which pin is which number in your list :s
Also what do you mean exactly by appending the values? You mean measuring voltages?
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