820-4924-a trackpad intermittent

MegaObi

Member
Hey guys i got this a1502 customer says track pad stopped working so cable was changed - went away sometime later stopped working again - changed trackpad - again after sometime come back - not working again. So I think this is an intermittent issue and its come in my hands now.

Right now completely working
 

2informaticos

Administrator
Staff member
Keyboard works, only trackpad issue?
I suppose you only refer to OSX.
Check if always works before login to OSX; try to acces boot menu.
Any liquid sign?
 

MegaObi

Member
No sign of liquid machine is very clean. i tried to close lid - put in sleep mode to see if problem will reoccur. I will try boot menu and yes osx.
 

MegaObi

Member
yes just tested in boot menu after few second trackpad its active. any ideas? also yes keyboard working.
 
Last edited:

2informaticos

Administrator
Staff member
Please specify...
Keyboard always work, even on OSX?

Trackpad always work on boot menu?
Only get trackpad issue sometime in OSX?

Before login to OSX, trackpad/keyboard connect with PCH through USB.
Once logged into OSX, SPI bus is activated.
If file vault is enabled, password screen will still use USB communication...
 

MegaObi

Member
Keyboard always works even on OSX

Trackpad issue is sometime in OSX

Could this one be software related. Seen a lot of threads about track pad not working or becoming unresponsive on Mojave.
 

2informaticos

Administrator
Staff member
Test it with different OSX then.

Keyboard is connected to PCH through trackpad circuitry.
If it always works there is low probability of bad trackpad...
 

MegaObi

Member
My bad it's on high Sierra. Problem is I haven't even seen the issue replicate itself. I'm going off what customer says.
 

JohnB8812

New member
Customer is probably wrong just saying. The trackpad cable is a recurring failing issue on these 4924 machines. I'd replace it again if necessary and just test it.
 

MegaObi

Member
No on this one trackpad is working but customer claims not working I been pulling my hair out trying to find why it wouldnt be working but so far after 3 days its always been working.
 
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