820-02536 no 20v

Need help with this problem I got myself into. Replaced screen on MacBook. Was working fine with broken screen. Used a Chinese screen which have used before with no issues. Battery was unplugged and charger not connected.
Board will not take 20v now and won’t power on. Stuck at 5v and 0.06a
Took measurements around U5700
PPBUS_AON is 12v
PP5V_AON is 5v
P3V8AON_PVCC is 0v
P3V8AON_PWR_EN_R is 0v

PP3V8_AON is 0v

Around UF500
PP3V3_S2_LDO 0.8v
PP3V3_UPC1_LDO 3.4v
PP1V5_UPC1_LDO_CORE 1.5v
PP1V8_S2 0v

Not sure what to do, appreciate any help available.
Thank you.

First check diode mode to ground at 3V8_AON.

CHGR_EN_MVR is also 0V'

Thanks, customer is going crazy at me over this..
3V8_AON is 0.296 in diode model
CHGR_EN_MVR is 4.4v

Made me realise the U5700 readings i took earlier were wrong for P3V8AON_PWR_EN_R as its 4.4V too obviously

P5VS2TPS_PWR_EN is absent. Not short either, fearing U8100 is bad.

Post actual voltages for U5700; pins 8, 6, 7, 5, 12.

Pin 8 PPBUS_AON - 12.3v
Pin 6 PP5V_S2_P3V8AON_VDRV - 0.006v
Pin 7 PP5V_AON - 5v
Pin 5 P3V8AON_PVCC - 0.007v
Pin 12 P3V8AON_PWR_EN_R - 4.4v

Thank you

Still missing 3V8_AON?

Check diode mode to ground at pin 5.

Diode mode on Pin 5 was .523. I changed U5700 with one from a M1 machine just for wishful thinking as I am running out of time and most likely have to buy customer a new motherboard as they are really pressuring me and being angry towards me.

However I now have 5v on pin 5. I also have 3V8_AON present now.
Pin 6 is pulsing 2.4v to 0v. In diode mode it is 0.243.
PPBUS is also pulsing now between 10v and 12.3v. It was constant 12.3v before I changed U5700.
Do you think I should put original chip back on?

Original chip didn't get 3V8_AON at all; so is probably bad.

Check diode mode to ground on all secondary power lines.