My touchpad is not working , cant find the solution . i tryed 1 other toupad , but same problem. is it directly conected to cpu , or is it driven by other stuff?
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Hi. See attached. These are boardview screen grabs - no schematics exist from my search in my database.
1) The trackpad operates using the I2C signals which are 2 line interfaces. One is for data (SDA) and the other for the clock (CLK). Each pair of signals must reach the PCH to communicate.
2) Do you have a multimeter for testing ? Configure for DC volts scale of 5 volts or higher is ok.
Check the voltage with red meter lead to pin # 1 = should be ~3v3 and black meter lead to ground - a metal shield on the logic board is ok.
Start with this confirmation first.
Next, move the red meter lead to pin # 3 & ground. Voltage reading ?
Then pin # 4 & ground.
Then pins 6 and 7 in the same way.
We want to know the voltage readings for each of these test points when the logic board is powered up. Often such interfaces will get killed from a liquid short or ESD damage and prevent communication to the host (I2C Bus Master controller).
Post the measurements along with the pins you have tested. Recommend that you do this with the original trackpad unless you are 100% sure the replacement is a valid replacement.Attached Files -
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Thanks also for this. I just picked up the same laptop and it has three issues; battery not working/charging, trackpad not working and sound chip not detected.
I have another ASUS touchpad with 7 pins and it also didn't work so suspecting mainboard fault. I'll post back after testing as above.Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Remove the track pad cable and measure the same pins again. Post the voltage readings for each pin.Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Add the track pad and post the voltage readings again.Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
See attached.
Remove all power / no battery -> with the trackpad cable attached & meter in resistance mode -> check the resistance to ground for each of the trackpad I2C pins (SCL & DATA).
One meter probe on the SCL; other to ground -> what is the reading ?
Repeat for the DAT_C line in the same manner.
Next, flux and remove D3101 ESD diode array. Measure the voltage again on the above 2 points of interest.
Post the readings.Attached FilesComment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
comparing with boardview, I don't have d or q 3101.Attached FilesComment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
When you select pin #3 or #4 on the connector, which other parts are mating to these contacts?
Perhaps the esd diode is on the other side of the board?Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
This is nearly the exact board version I have:
https://devicedb.xyz/dev/file/3886-a...boardview-asc/
I think the boardview files here at badcaps for X555UJ are not quite for this one.
Mine is 60nb0ag0-mb1112
I traced continuity from pin5 to this chip:Attached FilesLast edited by steve.rand; 07-26-2022, 01:16 AM.Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
As a test, flux and remove this part. Test again without this part.Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Will do! So far though, would you say there is anything obvious to suggest a mainboard fault? There isn't much on the touchpad and I have continuity to it via the ribbon cable but it's relatively cheap to replace. (albeit a 2 month shipping time)Comment
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Re: ASUS X556UJ_MB rev 2.0 touchpad
Pin 5 is actually pin 4 GND
60NB0AG0-MB1111 boardview https://www.badcaps.net/forum/showpo...76&postcount=4
.Last edited by SMDFlea; 07-26-2022, 04:41 AM.Comment
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Hello guys,
need help, i have a laptop that i encountered having keyboard and touchpad not working, not immediately going to BIOS i already tried replacing even just the keyboard with a new one but still problem exists. now i only realized to checked it from bios to erase doubts. i found out both touchpad and keyboard are working only on BIOS but not on windows.
since i cant just reformat the said laptop, i tried installing MyAsus utility and updated my drivers , and windows update as well. i included updating the bios to latest 3.08 version. still kb and touchpad is working on bios... -
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With ASUS, not everything is quite so simple. I will show you my way. It may be longer or harder but it is the right way to do it in my humble opinion.
For example, you can have 3 similar ASUS motherboards, all being the same model, all of which will have different BIOS versions.
I will give you an example and my version of preparing BIOS from ASUS website and in the process I am always cleaning Intel ME while doing it so you have fully cleaned BIOS, no DMI data, no password, nothing.
This is the picture of 3 similar ASUS motherboards, all of them being X555LD... -
Hello, I have an issue with the motherboard. Specifically, it doesn't power on, more precisely, the POST initialization doesn't occur.
Let me start from the beginning, the motherboard suddenly stopped working one day. There are no beep signals from the speaker, and the debug LEDs are not lighting up. After inspecting it under a microscope and using thermal imaging, I didn't find anything that could be damaged.
After that, I began voltage measurements, in which I noticed the absence of VDDQ, VDDP, VTT, and VPP lines. Later, I checked if there is an EN state on these lines,... -
Good afternoon friends
I have an Asus laptop motherboard X455LJ REV 3.1 that the touch pad does not work, I was trying to check if something was wrong at the drive level but I did all the necessary installations and the touchpad still does not work.
I have a feeling that the error goes more to the board level because the touchpad is not recognized by the device manager and it is supposed that even if it does not work correctly it has to be detected.
I even checked that the data bus made a connection between the touchpad and the motherboard and everything...
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