near the memory slot is code C14CU4X REV: 1.0.
in the corner of the motherboard there is another code: 71R-C14CU6-810

no power, PRESENTS 3.3V VOLTAGE ON MEMORY PIN 8.
on the CN16 connector which is the on / off button board the voltage is +/- 4v and when the power switch is pressed the voltage drops to 0 volts. (until everything in order)

-> as reference to find the right schematic the super i / o to ref. and U19

--> U31 is the OZ8293LN
--> U16 É o 8153LN

Check this schematic. Maybe is it similar.
viewtopic.php?f=250&t=4461&p=186844&hilit=%2Ac14cu%2A#p186844

voltage 3v3 on pin 8 of the memory (bios). It has a voltage of 5v on the coil L1.
In the OZ8153LN pin 20 (LX2) has voltage of 5V. no vcore voltage, cold processor. Pin 15 and Pin 16 of the OZ8602 (BATT IN / CHARGER) with 19v.