Asus ZB551KL Training & Trouble Shouting Manual page 59

Volume Key Abnormal (II)
• • PM_RESIN_N is 1.8V， But pressRear key vol
down key can't change low
• – Check J1401
• • PM_RESIN_N is floating， Multimeter check
is 0.6V，Oscilloscope check is 0V
• – CheckU0501
• • PM_RESIN_N Short circuit to GND
• – Check J1401
• – Check U1101
• – Check U0501