No VIN/ DCIN

a. DC JACK LOOSE,OPEN,INNER CYLINDER CONTACT PROBLEM OR CARBONIZED

b. SERIES BID COIL OPEN,FUSE OPEN OR DRY JOINT

c. IF ADAPTER LED BLINKS,LINE SHORT OR PCB BURNT, PARALLEL DIODE SHORT

d. Adapter TRIP due to B+ SHORT OR INCOMPATIBLE ADAPTER

e. Reverse connected DC JACK in older model

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NO B+, DCBATOUT

a. B+ LINE SHORT TO GND,LCD CABLE BURNT,BURNT DECOUPLING CAP ON B+ LINE

b. ACFET,RBFET D-S -G SHORT,NO GATE VOLTAGE OR 19V GATE VOLT ON P-CH MOSFET GATE

c. No ACDRV, NO ACDET, Low ACDET OR ACOK,REGN DROP

d. Charging Chip VIN TO GND SHORT and therefore series resistor open

E. Charging chip REGN pin SHORT TO GND

f. HIGH SIDE MOSFET FAULTY OF ANY OF THE CONVERTER SUPPLY CAUSES OCP ACTIVE. B+ IMPEDANCE LOWERED UNDER 100

g. ADP_EN Logic fail

h. CLEAR CMOS IN SONY HKx Series to Discharge Latch Circuit activated prior

i. M2A 6pin BI- TRANSISTOR FAULY in U8x Series ACFET Gate Driver

j. INCOMPATIBLE CHARGER OR LIMIT SIGNAL PIN ISSUE IN PROBOOK SERIES

k.BATFET SHORTED D-S ALSO CAUSES ADP TRIP

l. IF TRIPING OCCURRED WITH BATTERY, Charging converter problem, check BST RESISTOR OPEN in CHARGING SECTION

m. NVDC charger BUCK BOOST CONVERTER NOT STARTED due to Asgate low

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LOW B+ SUPPLY........................To be continue