HP Pavilion g4 g6 g7 (quanta r23 sabin rev 1a) Laptop Schematics
EC KB3926 – U5
RSMRST# must drop if power button its press
+VGACORE RT8208 1.8V
CHECK PL22 for GPU VOLTAGE
OZ8681 PU9 Charger IC
Check DCIN PIN 1 (must be 19v)
If not check PQ24 FDMC4435BZ and all the diodes aside connected to ground.
If all the voltage its present go to HP website and take the BIOS file and reflash the BIOS IC.