Help: Rt8249c

[dhan]

Hello, I wonder how EN1 and EN2 will be turn ON, I have 3.3V on LD03, which is always ON.
but I don't have LD05 5V.
as the datasheet says, LD05 will turn on if there is 3.3V on EN1 or EN2,
Phase 1 and Phase 2 voltage is also not present.

the laptop takes 22mA only.

could be the chip is faulty?

Thank You

[mcplslg123]

Re: Help: Rt8249c

5V LDO will be generated when EN1 is high. EN1 is enabled by EC_ON signal from kbc.