A1466 820-00165 Pulsing S5_PWR_EN after lots of corrosion

[it-solve]

PPVRTC_G3H = 3.4V - with slight pulse of 0.2V
PP5V_S5 - 5V pulsing to 3.8 for a sec and restores back to 5V
PP5V_S4RS3 - 0V - pulses to 3.9V

Lots of oxidation marks after being repaired previously
Repaired corroded traces around U5110
Some work done around Y5110 as SMC silicone is removed.

Where to head first?

 

[2informaticos]

Be sure no other components, or traces/solders corroded.
Reball/replace SMC.