820-00165-A No green no power

[tipoti]

hello,

there was corrosion in the smc area. No voltage in smc_reset_l. I checked the R5100, it's solid, could the 100k smc be dead?
I changed the u5110, the result is the same

PPBUS_G3H 8.17 volt
PPBUS_S5_HS_COMPUTING_ISNS : 8.17 volt
PPDCIN_G3H_ISOL : 16,5 volt
PP3V42_G3H : 3.4 VOLT
SMC_ONOFF_L: 3.4Volt
SMC_LSOC_RST_L : 3.0 volt
SMC_RESET_L : No voltage

 

[2informaticos]

Start reballing SMC.
Must be done always when corrosion detected near it.

Then post all U5110 voltages.
You can even compare its voltages before and after reballing.
Be sure all pads and traces under SMC are good.

 

[tipoti]

I did smc reballing but the result did not change. Then I noticed that while R5127 was reading 3.4 volts on pin2, it was 3 volts on u5110 pin3. When I checked, I saw that there was a break at the TP point. I made a connection from R5127 to U5110 pin3 and the green light came on, the device was turned on