A2289 No power.

[Stephen]

No water damage on board.

Customer came in with board dead.

5.20V
0.00Amps

Sometimes I see a .03amp and it jumps to .46A and then resets to zero.

Customer stated they used a knock off charger but both chips seem fine and are reading fine. Checked readings

PPBUS_G3H is present
PP3V3_G3H is present
PP1V8_SLP is present
Awake is present


PP5V_G3S is not present

Tested USB C readings on UEM2. Comes up good.

[Stephen]

Re: A2289 No power.

Tested ppbus_G3H voltage is 12.23Volts

Check wiki and it says if it’s below 12.60 it’s a T2 issue?

[Stephen]

Re: A2289 No power.

So far what I’m pointing at is a bad ISL9240 wish me luck

[Stephen]

Re: A2289 No power.

Replaced ISL9240 chip, no power. but now have a constant .03 amps 5.20volts

[Stephen]

Re: A2289 No power.

Going to replace CD3217 chips. Seems to me all power rails are present, going to assume both chips are bad. Hopefully this solves this problem

[mon2]

Re: A2289 No power.

Check the LDO rails of each CD3217. Check the USB / CCx port pins in DIODE mode.

[Stephen]

Re: A2289 No power.

LDO rails present and normal.

Diode Mode normal. CD3217 seems to be the issue then.

[Stephen]

Re: A2289 No power.

UPDATE: Replaced both CD3217 chips.

still 5.15v
0.03 Amps
HOWEVER, the amps jump to .96 consistently now. No idea whats going on. I would know if it was consistent .31 amps etc. but it just keeps dropping to .0A or .03 Amp then jumps to .96a then sometimes .63 and up and still no 20volts. This is a better look than last week on this board but now i feel i am getting closer to fixing it but I am still dumbfounded. lol

also i am hearing a clicking noise when plugged in. You can hear it go click, click click. near the T2 chip area

Put thermal camera on, found the little bastard!

Cap C4400 was blown and pumping 120F then dropping with alcohol on it.

and now she is on

[mon2]

Re: A2289 No power.

Well done!