Platform : samsung_300_Petronas-D 15

Hi!

Got for repair, with no lights, no standby voltages, completely dead.
Removed shorted Q11 and shunted temporarily Q10 directly to R82
Found P3.3V_MICOM shorted to Gnd, removed MEC1310-NU, short was gone.
Replaced failing TPS51125RGER with a good working recovered one
Also replaced each faulty SIZ300DT (tiny dual fets) not available, with 2 Toshiba N-channel fets TPC8040 and TPC8A03? which I glued on secure site on mobo and made necessary shunts to make them work.

Got standby voltages with MEC1310-NU REMOVED AND NOT YET REPLACED.
VREG 3 : +6.82V ???
VREG5 : +8.90V ???

1*- Generally speaking what faulty component is likely to make VREG3 and VREG5 to be so high when SYSTEM DC/DC Ic is checked good ???

2*- For Samsung 300 under repair, I Guess that issuing VREG3 and VREG5 has nothing to do with I/O controller MEC1310-NU, please correct if I'm wrong;

2*- Where to check further knowing that TPS51125 was already replaced ?

thank you