acer aspire 5742 (La 5893p) no power

roby123

please help me

The laptop does not turn on, no lights on.
On pins 1 and 2 of the battery, I measure 19V, 0V other pins
On pin 24 of PU7, I measure 0V
On the reels have not found any short.
The laptop does not detect power supply
Changed Pq62, Pq64, and the PU17 , does not power

Thank you

RsM

What the resistance of B+ ?

roby123

0.5 Mohm

The 3 and 5v not present

Thank you

RsM

ok. Is there 19V on B+ ? (you should use AC adaptor only)

roby123

Yes, 19V is present on:
Pq53:
Pin 1, 2 and 3.

RsM

roby123 писал(а):

19V is present on:
Pq53:
Pin 1, 2 and 3.

And is there something on pins 5-8 at the same time? (without battery connected)

Check voltage on pin 4 of PQ51 & PQ52 and write down the value.

roby123

Pq51:
pin4 = 0V

Pq52:
pin4 = 19.43V

Pq53:
pin 1, 2 and 3 = 19.40V
Pin 4= 3.40
Pin 5, 6, 7 and 8 =18.90v

RsM

roby123 писал(а):

Pq51:
pin4 = 0V

Pq52:
pin4 = 19.43V

And how it can be possible? They are both connected to 1 point. Check it

roby123

Excuse me, I was wrong pin

Pq51:
pin4 = 0V

Pq52:
pin4 = 0V

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acer aspire 5742 (La 5893p) no power

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