HP 15S No power No LED indicator NO Display issue Shorded +3V LID SIGNAL CHARGING IC 

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may maraming supply ang SIO, +3VLP AT +3VALW, POWER OK, need mo ilagay yan lahat sa SIO para malaman mo pag naging Fully powered ang SIO kasi lahat ng Section nya mag Turn-on, yung GPIO,GPI,LPC_Misc, AD Input & DA output ,GPO, PS2,PWM, para sabay sabay sila maging active doon mo matrace ang Shorting, Same lang po yan nang iniisip mo, pero pwede di lumabas agad ang short, pag sa coil ka lang nag inject, di lahat ng section ay magiging Active. what if kung ang signal shorting ay doon galing sa isang Section na di sinusuplayan ng 3V coil. pwede ka mag mintis. kaya ang method na yan ay External power supply Module injection to simulate power sequence. Need mo override ang protection ng 3V ciruit (pwm). TO KNOW MORE ABOUT 7 DIAGNOSTIC METHOD avail our training. or text 09209593465