Have a Nice to all
I have Lenovo G50-80
Mobo pn: Aclu3/Aclu4 NM-A361
*Laptop Unit Status: if you plug the Charger Adapter. indicating power on status Light. i press the power Switch long Turn of then on the Light Again.
*Before the unit before came in my technical Area. i pressing the power button unit turn on then light on indicator after 3 or 5 sec turn off?
I decide dismantle the laptop unit. inspected first Check for water spilled negative on corroded mobo is clean. check the voltage from dc in. 20.2V.
to fuse 20.3 on all rail.
check on PQ301
123 - 20.3V
4 - 5V? i i have question for this. it is Voltage Drop?
5678 - 20.3V
I check the Mosfet. Mosfet is Good
check on PQ302
123 - 20.3V
4 - 5V
5678 - 20.2V
Also This Mosfet is Good
check ic - PU301
1. 20.3V
2. 20.3V
3. 0V
4. 1.6V
5. 0V
6. 2.6V
7. 0V
8. 3.3V
9. 3.3V
10. 00.8V
11. 1.5V
12. 1.8V
13. 1.8V
14. 0V
15. 0V
16. 5.9V
17. 5.8V
18. 1.8V
19. 1.8V
20. 20.3V
try to change this IC. same Prod Code BQ737
Same. Problem nothing Happen
then i Check
PQ303
123 - 20.3V
4 - 20.1V
5678 -1.8V
other i Check the Always... 3.3VALW & 5VALW.
Which parts are Faulty?
Need to your Advice.
TIA.
I have Lenovo G50-80
Mobo pn: Aclu3/Aclu4 NM-A361
*Laptop Unit Status: if you plug the Charger Adapter. indicating power on status Light. i press the power Switch long Turn of then on the Light Again.
*Before the unit before came in my technical Area. i pressing the power button unit turn on then light on indicator after 3 or 5 sec turn off?
I decide dismantle the laptop unit. inspected first Check for water spilled negative on corroded mobo is clean. check the voltage from dc in. 20.2V.
to fuse 20.3 on all rail.
check on PQ301
123 - 20.3V
4 - 5V? i i have question for this. it is Voltage Drop?
5678 - 20.3V
I check the Mosfet. Mosfet is Good
check on PQ302
123 - 20.3V
4 - 5V
5678 - 20.2V
Also This Mosfet is Good
check ic - PU301
1. 20.3V
2. 20.3V
3. 0V
4. 1.6V
5. 0V
6. 2.6V
7. 0V
8. 3.3V
9. 3.3V
10. 00.8V
11. 1.5V
12. 1.8V
13. 1.8V
14. 0V
15. 0V
16. 5.9V
17. 5.8V
18. 1.8V
19. 1.8V
20. 20.3V
try to change this IC. same Prod Code BQ737
Same. Problem nothing Happen
then i Check
PQ303
123 - 20.3V
4 - 20.1V
5678 -1.8V
other i Check the Always... 3.3VALW & 5VALW.
Which parts are Faulty?
Need to your Advice.
TIA.

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