Apple 820-01958-A logic board stuck on 5V .19amp

[mferna14]

Hi friends, working on a MacBook Air A2179 logic board 820-01958-A logic board. It's just stuck on 5V .19amp on one USB-port & then when I use to the other port it's also stuck on 5V .19amp but on this port it resets after few secs & start over with the same said voltage. I assumed that one of the CD3217B12s is defective, & replaced both with known good ICs. The status & result remains the same. I checked for shorts or liquid spill, all clear. On F8400 there is 12v present, but no 5V or 3.3 volts. There are LDO voltages on the both CDs 3.2v & 1.5V. Kindly if someone can help me troubleshoot this. Thanks in advance

[mon2]

Is the fixed current draw immediate or climbs up to this value? If fixed, often will be a shorted part.

On the missing power rails, test if their output legs are shorted. Test if the local enable pins are present or not.

[mferna14]

Thanks mon2., the current draw is stable to .19amp, does not increase or decrease.I checked for shorts, cannot find anywhere, ever coil & caps have resistence. more than 2K. Enable pins of what?? IC (CD3217B12) you mean??I checked the voltages, only the G3H (20v) is missing. Rest the 12v & LDO voltages are fine & present, only goes when the logic board resets again.