Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

[TaHuC]

Hi, the laptop powers on only with battery and the voltage drops to 15 V at "PQ301 PQ302 PQ303" elements. The laptop starts but the picture goes blur even with the charger on. The PU301 chip was replased, but the problem still persists. The laptop wont power on withot battery only with the charger in. PLS help

[SMDFlea]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

Have you checked the charger voltage,is it a genuine lenovo charger.Test the DC-IN mosfet .

[TaHuC]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

I've replaced them both, just to be certain. no change

[Techtiger]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

What is Voltage of PQ301 PQ302 All pins ? Pin 4 of both fets short be 9.56V approx to switch on the Fets

[TaHuC]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

What is Voltage of PQ301 PQ302 All pins ? Pin 4 of both fets short be 9.56V approx to switch on the Fets

no power - PQ302 123-20v 4-5v 5678-20v, PQ303 123-20v 4-20v 5678-1.9v, PQ301 123-20v 4-5v 5678-20v
on power - PQ302 123-19.7v 4-19,7v 5678-15v, PQ303 123-15v 4-3.5v 5678-1.9v, PQ301 123-19.7v 4-19.7v 5678-20v
when powered on every 4-5 sec the voltage goes up to 20v and immideately drops back to 15v

[Techtiger]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

no power - PQ302 123-20v 4-5v 5678-20v, PQ303 123-20v 4-20v 5678-1.9v, PQ301 123-20v 4-5v 5678-20v
on power - PQ302 123-19.7v 4-19,7v 5678-15v, PQ303 123-15v 4-3.5v 5678-1.9v, PQ301 123-19.7v 4-19.7v 5678-20v
when powered on every 4-5 sec the voltage goes up to 20v and immideately drops back to 15v

test the voltage on PU301 pin 1 2 5 6 7 20 16 with out battrey , if it drops to +15V one of the SMD components BAD in page 53 of schematic, when chager is in the battrey gets charge ?

[TaHuC]

Re: Lenovo G50-80 ACLU3/ACLU4 NM-A361 NO POWER WHITOUT BATERRY

test the voltage on PU301 pin 1 2 5 6 7 20 16 with out battrey , if it drops to +15V one of the SMD components BAD in page 53 of schematic, when chager is in the battrey gets charge ?

when not on, with the charger in Pins are1-20v 2-20v 5-3.25v 6-2.65v 7-0v 20-19.58v 16-6v; when it is powered on with the battery in (it is not starting witot the battery) 1-20v 2-20v 5-0v 6-2.65v 7-0v 20-18.9v 16-6v.
Inoticed the 15 v that are shown are from the battery it self.