Hp probook 450 g3 not turn on

[arber1232]

Re: Hp probook 450 g3 not turn on

remove C28 and check if the 3.3V is back CN5 pin 3

no now i have 2.5 v

[arber1232]

Re: Hp probook 450 g3 not turn on

The Q8 pins are wrong in the schematic - https://www.badcaps.net/forum/showth...ht=DAX63CMB6C0

when i pres power butonn pin 1 and pin 3 going 0 v its ok ? power buton in cn5 is pin 3 and he conect with pin 1 the mosfet Q8

[SMDFlea]

Re: Hp probook 450 g3 not turn on

in pin 10 i have 5.4v

Yes as you mentioned at post #12 ., sorry .You still have 0v though at pin 2 PGOOD ,test resistance to ground and PR70 should be 3.3K ,and test voltage on PR348

.

[arber1232]

Re: Hp probook 450 g3 not turn on

Yes as you mentioned at post #12 ., sorry .You still have 0v though at pin 2 PGOOD ,test resistance to ground and PR70 should be 3.3K ,and test voltage on PR348

.

PR70 is 3.3k .. and voltage 0 v .....
PR348 is 0.99k and voltage 0.5v

[arber1232]

Re: Hp probook 450 g3 not turn on

Yes as you mentioned at post #12 ., sorry .You still have 0v though at pin 2 PGOOD ,test resistance to ground and PR70 should be 3.3K ,and test voltage on PR348

.

CAn i try to jumb pin 2 PGOOD with pin 4 in Pu21 to have 5v ?

[mcplslg123]

Re: Hp probook 450 g3 not turn on

CAn i try to jumb pin 2 PGOOD with pin 4 in Pu21 to have 5v ?

No, you cant. Check pin5 of PU21 also. The voltage at the power switch may be ok. Have you flashed bios?? If not, do that first.

[arber1232]

Re: Hp probook 450 g3 not turn on

No, you cant. Check pin5 of PU21 also. The voltage at the power switch may be ok. Have you flashed bios?? If not, do that first.

pin 5 .. 3.3v ,,, no im not try bios

[arber1232]

Re: Hp probook 450 g3 not turn on

pin 5 .. 3.3v ,,, no im not try bios

[SMDFlea]

Re: Hp probook 450 g3 not turn on

NO, only use SY8208C

[arber1232]

Re: Hp probook 450 g3 not turn on

NO, only use SY8208C

hiii everyone im back i change this ic SY8208C but now something else happens to me the laptop turns on with a battery that is charged but does not get charged and does not turn on if the battery is not inserted .. the moment the laptop turns on I can remove the battery and it works fine when both are and the charger and laptop battery does not charge

[mcplslg123]

Re: Hp probook 450 g3 not turn on

@arber1232, Can we really help with much information you gave?? Why not check the basic stuff like DC-IN mosfets D-S-G pin Voltage, check them for short,check charging ic pin voltage,AD_ID status?? With only adapter connected, do you get dc jack light??

[arber1232]

Re: Hp probook 450 g3 not turn on

@arber1232, Can we really help with much information you gave?? Why not check the basic stuff like DC-IN mosfets D-S-G pin Voltage, check them for short,check charging ic pin voltage,AD_ID status?? With only adapter connected, do you get dc jack light??

I checked everything you are saying but the voltages there are OK .. no I do not have any light on .... in DC IN pins the voltages are
pin1 and 2 19.6 v
pin 3 and 4 GND
pin 5 are 5v
pin 6 - 0v
pin 7 -3.5 v
pin 8 - 3.3 v
and i not have light in dc charger no white or amber

[lapfix]

Re: Hp probook 450 g3 not turn on

@arber , as mcplslg mention before , start by the basic stuff .
PQ26/27 = D,S and Gate voltages

U13 =
Pin 42 = ADP_A_ID
Pin 44 = OCP_A_IN

[arber1232]

Re: Hp probook 450 g3 not turn on

@arber , as mcplslg mention before , start by the basic stuff .
PQ26/27 = D,S and Gate voltages

U13 =
Pin 42 = ADP_A_ID
Pin 44 = OCP_A_IN

i have 19v in this mosfet are ok but with charger laptop not turn on .. with batery turn on .. and no light in dc jack

pin 42 . and pin 44 not voltage but this line is ok not shorts

[lapfix]

Re: Hp probook 450 g3 not turn on

@arber , please give us the voltage as i ask for and not only OK

[arber1232]

Re: Hp probook 450 g3 not turn on

@arber , please give us the voltage as i ask for and not only OK

Pin 42 = ADP_A_ID-- 0v
Pin 44 = OCP_A_IN-- 0v

sorry do you need other voltage ?

[lapfix]

Re: Hp probook 450 g3 not turn on

PQ26/27

PR173 from the 2 sides / PQ5

Use the BRD given by SMDflea to locate it

[arber1232]

Re: Hp probook 450 g3 not turn on

PQ26-19.5 v both side

PQ27-19.5 v both side

PR173-0V both side

PQ5
Pin 1-0v
pin2-7v
pin3-0v

[lapfix]

Re: Hp probook 450 g3 not turn on

Are DC IN pins pin 6 short to GND !
PQ23 voltages
R174 / 172 value !

Sorry PQ 26 Gate !

[arber1232]

Re: Hp probook 450 g3 not turn on

No is not shorts..
R174-13k
R172-100k



PQ23
pin 1-0v
pin2-0v
pin3-0v

Pq 26 i remove and i jump D with S