Aspire VN7-572 - VN7-572G no Power need help

[DWCS]

Aspire VN7-572 - VN7-572G - VN7-572TG RAYLEIGH_SL MB 14306-1M

this board no power with c-mose battery. i remove the c-mose batter board working. need help to fix it i upload board view file rtc1

[mon2]

Check the dual diode @ D2501.

Remove all power / remove the battery. Meter in diode mode. Measure the diode with red meter probe on pin # 2 & black meter probe on pin # 3. Should conduct. Reverse the meter leads and it should block.

Repeat with pin # 1 & # 3. This dual diode may be defective.

[DWCS]

Check the dual diode @ D2501.

Remove all power / remove the battery. Meter in diode mode. Measure the diode with red meter probe on pin # 2 & black meter probe on pin # 3. Should conduct. Reverse the meter leads and it should block.

Repeat with pin # 1 & # 3. This dual diode may be defective.

2pin and 3pin -322 in diod mode
1pin and 3pin same

[mon2]

Now reverse the leads for each and test again. Probably ok but confirm it.

[DWCS]

Now reverse the leads for each and test again. Probably ok but confirm it.

i change prob and check no reading

[DWCS]

Now reverse the leads for each and test again. Probably ok but confirm it.

and i chage that diod but same fault

[mon2]

Measure the voltage to ground on pin #2 of this dual diode.

Then check again on pin # 3. Post each measurement.

[DWCS]

Measure the voltage to ground on pin #2 of this dual diode.

Then check again on pin # 3. Post each measurement.

pin#2 - 3.16v
pin#3 - 3.09v

[mon2]

Locate mosfet Q2505.

What is the voltage to ground of the DRAIN pin (RTC_DET#) with the CMOS battery installed?

What is the voltage to ground of the DRAIN pin without the CMOS battery?

[DWCS]

Locate mosfet Q2505.

What is the voltage to ground of the DRAIN pin (RTC_DET#) with the CMOS battery installed?

What is the voltage to ground of the DRAIN pin without the CMOS battery?

voltage (RTC_DET#) with the CMOS battery 0V


without the CMOS battery voltage (RTC_DET#) 0V

[mon2]

Is there a charged battery or external power adapter attached to the board during these tests?

[DWCS]

Is there a charged battery or external power adapter attached to the board during these tests?

YES ADPTER PLUG

Thank you for helping me you are so kind to help me fix this

[mon2]

Locate resistor network RN601. Carefully measure the voltage on either pin # 1 or # 2 and this should be ~3v3 (3D3V_S5).

[DWCS]

Locate resistor network RN601. Carefully measure the voltage on either pin # 1 or # 2 and this should be ~3v3 (3D3V_S5).

COMES 3.3V PWR BTN PRESS TIME

[DWCS]

Locate resistor network RN601. Carefully measure the voltage on either pin # 1 or # 2 and this should be ~3v3 (3D3V_S5).

C-MOSE Once cleared it always works

[DWCS]

C-MOSE Once cleared it always works

BIOS CLEAN ME AND REPROGRAM IT'S SAME FAULT

[DWCS]

Locate resistor network RN601. Carefully measure the voltage on either pin # 1 or # 2 and this should be ~3v3 (3D3V_S5).

i change finaly R1615 , C1603 , C1603. IT'S WORKING NOW THANK YOU SIR YOUR HELP TO ME. you are so kind 👬🙏

[mon2]

The fault was in the crystal area? Was this area damaged or just not oscillating? Well done! Thanks for the updates.