Macbook Pro 13" A1502 motherboard 820-3476A Orange led no power on

After connecting magsafe led is green and afer 2 second becomes orange.
I checked U7501 and voltage on L7520 and 7560 was up and down
After replacing U7501 now voltage is missing on L7520 and 0,4V on L7560

After solder old chip nothing is changed but I saw that a resistor was missing and now I got up and down voltage on both coils L7520 and 7560 fro 0V to 0,5V

I checked pin + of battery connector is 12,5V but after 3 seconds drops to 4V for 3 seconds and goes back to 12,5V continuously

Voltages of U7501
1=0V
2=0V
3=0V
4=5V
5=0V
6=5,1V
7=0V
8=0V
9=0V
10=4,8V
12=3,42V
13=5,1V
14=5,1V
15=4,8V
16=0V
17=0V
18=0V
19=5,1V
20=0V
21=3,42V
22=3,9V
23=12,5V
24=0V
25=0V
26=5V
27= 0V
29=5,1V
30=0V
31=5V
32=0V

Start by measuring the resistance to ground on PP3V3_S5. PP5V_S4/

Your initial decision to replace U7501 seems reasonable. Since EN is present, it confirms that SMC is alive and has allowed the power-up sequence, which is a good sign.

However, there may still be a short or abnormal load downstream of the PMIC. The rather abrupt reaction after the replacement suggests that U7501 could be shutting itself down due to protection mechanisms, such as OCP or OVP, rather than a control or firmware issue.
Edit Ai:
In Apple boards, standby lines like PP3V3_G3H are always live, but 5 V rails tend to be more vulnerable to shorts from I/O, USB, or other peripherals. Check these rails carefully before concluding that U7501 is faulty.

I found short on PP3V3_S4
After injecting 3,3V I found a capacitor shorted and after replacing Mac works again.