820-00045 keyboard and trackpad not working

[ytesfay80]

I haven't done anything to this machine except for try different flex cables. The last time I touched it was about 2days ago and it was turning on. The only thing I've messed with since then was the trackpad cable/connector while leaving the battery connected.

Also, I measured the trackpad connector with no cables plugged in and I didnt get any voltages except for on SMC_LID, SMC_ONOFF_L and PPBUS_G3H_TPAD_FLT.

Shouldn't the machine turn on as soon as the charger is plugged in?

 

[ytesfay80]

I went to the power aliases page and took measurements on the G3Hot, 5v, and 3v3 rails with the charger plugged in.

All of the "G3Hot" (Always-Present) Rails were present and measured fine except for PPVBUS_E85 which measured 14.9v instead of the 20v the schematic says.
There was 5v on PP5V_G3H_LDO but no voltage on all the other 5v rails and nothing on any 3v3 rails.
PP5V1_S4SW was also 0v as well.

 

[dukefawks]

I have no idea man, you could have poked/shorted anything at this point. You fucked it up.....
15V on E85 is the normal voltage and would indicate SMC and everything is running.

 

[ytesfay80]

Okay could you help me with which component creates the 5v_s4 rails and the 3v3_s5 rails. I'm looking at the schematic but I can't seem to find where they are created.

I checked all the main power rails and none of them are shorted to ground in diode mode with battery disconnected.
I checked L7520 where PP5V_S4 should be and it never has any voltage on it even when I initially plug the charger in.

larossmann If I sent this to you how much would you charge to fix this if I send you the trackpad and cable also?