[SOLVED]820-4924 no KB and TPAD

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PhilipC

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liquid damaged machine, very little areas we're corroded a bit near the kb connector and a tiny bit near the trackpad connector and on the kb backlight.

The trackpad force touch actuates but no click is registered and no movement with keyboard only the power button and backlight works.

PP3V3_S4_TPAD measures 3.3v, no signs of corrosion near U4830 & U4820.
 

PhilipC

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i dont have another trackpad but i tried unplugging it and still no keyboard, also tried unplugging kb and still no tp
 

PhilipC

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ow i did not know that, i'll order in a new trackpad and cable. Thank you

Is that the same for all retinas?
 

PhilipC

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So its just the force touch ones that need the touchpad for the keyboard to work?

I'll check those corroded vias near the tpad connector
 

PhilipC

New member
Tried with another tpad and cable, forgot i had a extra housing. Same problem.

TPAD_SPI_INT_L via looked dodgey and sure enough it wasnt making a connection. Patched it up and all working now.

Thanks for all your input, would have probably taken me a while to figure out tpad was needed for kb
 

PhilipC

New member
Just noticed Left shift control and alt are not working. Tested with new keyboard same problem.

Checked for gunk in connector and continuity from the connector to U4850 all is good, any ideas?
 
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