A2442 820-02098 no powering on (usualy)

[hgoncalves]

Hi.

I have an A2442 820-02098 with only 5V and 0.17A

However, for 2 or 3 times during measurements (2 or 3 over 50), It reached 20V and seamed to boot (reach around 0.7A and stabalyzed at 0.25A).

Now is stuck at 5V again.

Client said it stoped working overnight and the board has no signs of damage.

Can you help?

 

[2informaticos]

All USBC ports and Magsafe have the same behavior?

 

[hgoncalves]

Hi.

On magsafe it doesn'p power at all. I don't even get a light on it

 

[2informaticos]

Check diode mode to ground at J5401.

 

[hgoncalves]

J5401 diode reading

J5401:
1 = 0.585
6 = 0.147
8 = 0.147

Pins 2, 4. 10 and 12 all have 0.147 on diode reeading when they should be NC I think

Everithyng else seams normal.

 

[2informaticos]

All mentioned pins are probably connected to VBUS.

Do you get any voltage at J5401?

 

[hgoncalves]

Hi.

I get 0V on every pin of J5401

Shall I replace U5500?

USBC5_CC1 diode reading = 0.585
PPVBUS_USBC5 diode reading = 0.145