[SOLVED]820-3476 - No Track Pad/Keyboard

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menatwork

New member
  1. - I used the external apple keyboard, but doesn't work.
  2. - I get light on the mouse
  3. - When i get the OS, the mouse move very slow and sometimes doesn't work.
  4. - The logic board don't have any liquid indication.
  5. - The area of U4801 is clean as well
J4813 (measurements without keyboard and trackpad):
  • Pin 4 = 3.42v
  • Pin 30 = 3.34v
U4801 (measurements without keyboard and trackpad):
  • Pin 4 = TPAD_VBUS_EN= 3.34v
  • Pin 15-16-17-18 (TPs) 0.56v
  • Pin 20 = Up and down 3.2 to 1.0v
  • Pin 21 = Up and down 18 to 14v
  • Pin 22 = 3.34v
  • Pin = 49 VDD = 3.34v
  • Pin = 51 SMC_PME_S4_WAKE_L = 0v
 
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menatwork

New member
Update:
Just tested with another keyboard and cable/trackpad and i still don't get nothing.


Merry Christmas
 
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dukefawks

Administrator
I have no idea, if you are testing with parts that are of unknown condition I cannot help you. Inspect trackpad connector on board too.
 

menatwork

New member
Update:
I just get a new trackpad/cable/keyboard and still the same thing.
The thing is, if i don't connect the trackpad/keyboard ans try use external mouse, the computer running REALLY slow. I can move the arrow, but like slow motion.
Sometimes when i plug the external mouse, the machine just shutdown.

I check alread U4801:
  • Pin 20 = Up and down 3.2 to 1.0v
  • Pin 21 = Up and down 18 to 14v
why i get up and down?
 

menatwork

New member
Freeze on the ASD page (ASD 3S162).
I can't move the mouse or whatever.

Sometimes when i plug the mouse or flash drive, the computer just shut down.
 

menatwork

New member
dukefawks , larossmann aprendiz Please take a look my measurement on J4813.
I don't have a lot knowledge, but a lot pins looks really weird to me

1 0.15v
2 0.15v
3 0.5v
4 - 3.4
5 - 3.4
6 - 0
7 - 0 to 0.43
8 - 0 to 0.49
9 - 0 to
10 0 to 3.4
11 0 to 3.4
12 0 to 3.4
13 0
14 3.4
15 0 to 3.4 (LOOP)
16 0 to 3.4 =
17 0 to 3.4 =
18 0 to 3.4 =
19 0 to 3.4 =
20 0 to 3.4 =
21 0 to 3.4 =
22 0 to 3.4 =
23 0 to 3.4 =
24 0 to 3.4 =
25 0 to 3.4 =
26 0 to 3.4 =
27 0 to 3.4 =
28 0 to 3.4 =
29 - 0
30 - 3.4
 

menatwork

New member
Trackpad

Pin 1 = 2.5 (disconnected)
1.4 (Connected)
Pin 4 = 5 (con and disc)

Pin 2-9 = 1v to 3 Loop (disconnected)
1.4 (connected)
 
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