ASUS Vivobook M7600R (M6500RC R2.0) - 19V Power Rail Not generated, AC-Detect

Measure the voltages to ground on pins 14, 15 of charger chip.

KenM0560 писал(а):[ Obrazek ]

Please, also post a picture of another side of the board.

Measure the voltage to ground on any pin of the current sense resistor you marked in the picture with a regular adapter connected.

KenM0560 писал(а):[ Obrazek ]

Please, post a clear picture of marked area of the board.

KenM0560 писал(а):[ Obrazek ]

Measure the voltages to ground on all pins of 5-pin chip marked "SCG" visible in the picture.

KenM0560 писал(а):could not see dot to mark pin1 on the chip

This chip is in a classic SOT323-5 (also known as SOT353) package with a standard pinout (picture below), so you counted the pins correctly.


Measure the values of resistors "A" and "B" marked in the following picture. Both resistors must be removed from the board to measure their actual value.

KenM0560 писал(а):There is around 50k ohms fluctuation either way when measuring.

Test your meter with a known good resistor with the resistance around 470k-1MΩ.
If you have the fluctuation as well, try to replace the batteries in your meter.

Also post a picture of this area of the board with resistors A, B and chips marked "SCG" and another marked "8KB" near it removed form the board (I want to see the path of the copper traces under these components).

Use a continuity tester and check, if the left pin of resistor "A" is connected to the ground.

Solder all components back to the board, except the resistor A and measure the following voltages to ground:
- On pins 1, 3, 4, 5 of chip marked "SCG".
- On pins 1, 2, 3, 4, 6 of chip marked "8KB".

Measure the voltages to ground on pins 1, 4, 5 of transistors "C", "D" under the same conditions (without the resistor A).