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diode mode to ground on pp3v3_g3h is 0.228. I injected voltage and u3900 gets warm. pp3v3_g3h has 0.0000 ohms resistance to pin 1 of L7810. i've reattached u7800 and nothing changed

it is 0.454 on both

with those resistors removed the rail is 0v but pp3v3_g3h_rtc_reg_r is stable at 3.3v and ppbus is stable at 12.37v

this board had a shorted u6903. it was pulling to ground both 3v3_g3h_rtc and ppbus. i replaced it but now the rails are quickly cycling.

upc_x_spi_clk isn't 3v ever. doesnt it have to be for u3060 to work?

when it's booted off the battery i get no reading on L2800 or L2900. should 0.9v be there when the board is booted?

upc_i2c_int_l is 1.776v i2c_upc_sda and i2c_upc_scl are both 1.8v but the amp meter cycles repeatedly so all voltages will come and go until it boots from the battery then the amp meter stays. i was able to load a clean copy of the OS with a fully charged battery. the amp meter reads 5v...

when it doesn't boot at all vccinaux_r cycles at 1.8v but ppvcc_s0_cpu stays at 0v. could this be cpu issue?

this board has me vexed. i've reprogrammed u3060 and changed both u3200 and u3100. i've also used several usb-c jacks. it basically gets to 5v 0.215a and then it loops. I can get it boot all the way with a charged battery. can't get it into dfu at all

ok thank you. I'll need to hunt down the correct chip

i checked the circuit and it's just not producing 3v3_g3h. i don't want to put on a new PMIC until i get that rail working. do you know where i can get a new tps51980b?

i'm getting no voltage for 3v3_g3h and it isn't shorted. does that mean that u7560 needs replacing?

no it doesn't boot. u7800 was shorting the 3v3_g3h rail and was removed. Does the u7800 have to be there for 3v3_g3h to work?

the 3v3_g3h rail became stable but then after running the configurator i started getting 6.8 volts on 3v3_g3h afterwards . i get 3.3v without u7650 on the board and 20v on the amp meter. how is this possible without u7650 on the board?

i don't have a good board so just plugged it up and both rails work. the gpu gets warm and the gpu rails show up but the cpu rails are nowhere to be found. there is no power LED showing but the airplane mode LED is on

could the pmic cause the 3v3_g3h rail to fluctuate like that?

i don't work on many non apple board so i'm a bit confused by this asus board. There was very low resistance on three power rails. +1.8VSUS and +1.05VSUS and +3VA_DSW. I removed the pch and the shorts were gone. i'm assuming they were shorts because they measured 0 ohms to ground. I replaced...

could the usb-c ribbon cause pp3v3_g3h to fluctuate? the rail shorted again and had the replace q7680. now pp3v3_g3h fluctuates sporadically from 2.0v to 3.1v. could this be a ribbon issue?

yes

i must've shorted pm_slp_s3_buf_l when i accidentally nudged u7870