Acer Aspire A517-51 no power

[FaissalDZ]

hi everyone!

I have Acer Aspire A517-51 laptop with no power
Model: N17C3
Motherboard: C5V01 LA-E892P REV: 1A

I already make some tests:

5VAL OK
NO 3.3VAL

LDO3 OK
LDO5 OK

5V_EN OK
There is no 3V_EN

ON/OFFBTN 3.3V OK

I need your help.

Thanks in advance.

[mon2]

Re: Acer Aspire A517-51 no power

See attached.

1) Check and post the voltages for the requested locations.

2) 3V_EN_R is from the KBC. This part may need to be reflashed. But first confirm that the KBC pin is mating with the 3V_EN circuit. Perform a resistance or continuity test between the KBC pin (3V_EN_R) and the resistor (1k) @ RB16, pin #1. What is the resistance ?

3) What is the voltage level for 5V_EN ? Expecting that 3V_EN should be similar in voltage to ENABLE the missing +3VALWP rail.

[mcplslg123]

Re: Acer Aspire A517-51 no power

MAINPWON present on DB1??

[FaissalDZ]

Re: Acer Aspire A517-51 no power

Good mooring .

It works, the problem was is the keyboard while the power button is embedded in.

When i insert the keyboard the ON/OFFBTN# signal drops from 3.3 to 2.5 v (probably liquid damage)

the requested voltages are:
MAINPWON : 3.3v
3V_EN_R, 3V_EN: 0.0v
RB16: 0.980k

after run power this voltage all goes to 3.3v

but no 3VALW before run power only 5VALW.

Can you guys give me some explanation?

Thanks.

[mcplslg123]

Re: Acer Aspire A517-51 no power

If it is working then what's the issue now??

[FaissalDZ]

Re: Acer Aspire A517-51 no power

If it is working then what's the issue now??

No issue at all.
I only asked why 3VALW not present in S5 state?

[Djamalhan]

Re: Acer Aspire A517-51 no power

No issue at all.
I only asked why 3VALW not present in S5 state?

what is the resistance of the 3vaalw circuit?

[FaissalDZ]

Re: Acer Aspire A517-51 no power

what is the resistance of the 3vaalw circuit?

Sorry!
The laptop has been returned to the customer.