Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Sorry, PQ1002 gate voltage is correct and your pq1004 is working. PQ1003 Voltage on PIN 4?? This is the gate i was looking at. Do you have same spare charger IC??

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Sorry, PQ1002 gate voltage is correct and your pq1004 is working. PQ1003 Voltage on PIN 4?? This is the gate i was looking at. Do you have same spare charger IC??

Hi , Thanks for help

I did not understand how PQ1002 is working as at Gate=18 volts which should be low as 7v or 9v for P type mosfet with source having 19volts?

In schematic it is written do not add test pad on bATdischarge_gate that is why i did not check voltage at pin 4 gate .

if it is save i check . let me know


No i do not have a spare charger IC.

One spare motherboard is Sony Vio SVE11AW which has charger IC different.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Pq1003=pin 4 gate= 0 volts

charger ic reading with power adapter in


Charger ic

vcc of charging ic pin 20= 19 volts

PC1028 vcc of charging ic= 19 volts


PR1026 vcc of charging ic= 19 volts




charging ic pin 6 reg6v= 6volts

charging ic pin 5 ACIN/ACPRES= 0 volts

charging ic pin 3= 1 volts
charging ic pin 1= 3 volts

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Charging IC's pin 1-2-3 should have shown same voltage-so do re check your measurements. Pin5 must be stable 3.3V and this signal goes to your kbc controller. Do check resistance on those pins. Pin 1-2 as well as pin3 should be 19V but you are not getting it as pin4(Gate) of PQ1003 is not opening. If PQ1003 is not shorted, very likely charging IC will need replacement.

PS:PQ1002 gate voltage at 18V is correct.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Charging IC's pin 1-2-3 should have shown same voltage-so do re check your measurements. Pin5 must be stable 3.3V and this signal goes to your kbc controller. Do check resistance on those pins. Pin 1-2 as well as pin3 should be 19V but you are not getting it as pin4(Gate) of PQ1003 is not opening. If PQ1003 is not shorted, very likely charging IC will need replacement.

PS:PQ1002 gate voltage at 18V is correct.

should i check these voltages with RTC battery IN and power adapter IN although there is no light on charging port of motherboard?. please do reply so i check measurements again

Yes PQ1003 has 0 volts on gate. if you have time what will be state of ACIN signal in case PQ1003 is working?

In my other previous motherboard this charging IC had the fault so it does occur to these ICs

resistance measurements without adapter plugin and RTC battery out???
'
Thanks for your time

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

01.Voltage can be measured with rtc battery in. Adapter has to be connected , else what you are going to measure.
02.ACIN should be 3.3V if PQ1003 is working but there are other conditions which has to be met like charging ic requirements, kbc controller .
03.Resistance has to be measured ALWAYS without any power.

Hope that clears your queries.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

01.Voltage can be measured with rtc battery in. Adapter has to be connected , else what you are going to measure.
02.ACIN should be 3.3V if PQ1003 is working but there are other conditions which has to be met like charging ic requirements, kbc controller .
03.Resistance has to be measured ALWAYS without any power.

Hope that clears your queries.

Thank you , will check and update in few minutes

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Thank you , will check and update in few minutes

charging ic PU1001

charging ic pin1= 0.01 ohm (beeps when check in contuity mode with grnd)
charging ic pin2=0.01 ohm (beeps when check in contuity mode with grnd)

charging ic pin3= 4.06 ohm (does not beeps when check in contuity mode with grnd)


resistance measurement for coils as well at 20kohm range selected DT-266 unity clamp meter(only available)


PL1001= show some values 19.7 then stable at L means out of range

PL2001= show some values 16.7 then stable at L means out of range

PL6001 = 0.00 ohms stable

PL2004= show some values 19.2 then stable at L means out of range


PL3001 = 0.30 ohms stable both sides

PL4012= 0.00 ohms stable

PL4003= 0.01 ohms stable

PL4004 = 0.01 ohms stable

PL9017 = 0.29 ohms stable

PL9010 = 0.08 ohms stable

PL9005 = 0.03 ohms value fluctuates from 0.20

PL9004 = 0.01 ohms stable

PL9001 = 0.01 ohms stable

PL4008= 0.00 ohms fluctuates to L out of range
PL4010= 0.01 ohms fluctuates to L out of range



voltages on charging ic again:

pin20 vcc=19v

pin=1,2,3,4,5= 0 volts

pin6= 3v

pin 7=0v
pin8= 0 ,1 volt fluctuating

pin9= 0 volts

pin10=0 ,1 volts fluctuating

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Hi Need Help Please,


In addition to above measurements some more without adapter not plugged but RTC battery still in


PQ1003 in diode mode = source to drain no sound OL ( red probe on drain pin5 and black on pin2)
PQ1003= source to drain Buzzer sound when black probe on Drain and red probe on source pin2)

while PQ1002 gives no buzzer

PR1008 = Big Fuse = when check for continuity gives Buzzer/beep

Charging IC BQ24738H pins 1 ,2 both pins(CSIN,CSIP) are giving beeps with respect to ground check in continuity mode.



PL3001= 1.2vsus supply coil condition is de coloured with respect to other coil ( little shiny spots not grey color anymore at edges)

PL6001= 1vs5_s2 supply coil condition is de coloured with respect to other coil ( little shiny spots not grey color anymore at edges)

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Your +PRWSRC or what we commonly call as B+ line is shorted to ground. Remove PR1008 and see which pad is shorted to gnd and then inject 1V on the shorted pad of PR1008 to find out what is getting hot. Dont inject more then 1V , else SOC may be killed if there is shorting on high side mosfet. Better check physically all high side fet for shorting also before injecting voltage.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Your +PRWSRC or what we commonly call as B+ line is shorted to ground. Remove PR1008 and see which pad is shorted to gnd and then inject 1V on the shorted pad of PR1008 to find out what is getting hot. Dont inject more then 1V , else SOC may be killed if there is shorting on high side mosfet. Better check physically all high side fet for shorting also before injecting voltage.

Hi,

physically all high side fet means PQ1004, Pq1002 etc +VA side mosfets or something else?

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Your +PRWSRC or what we commonly call as B+ line is shorted to ground. Remove PR1008 and see which pad is shorted to gnd and then inject 1V on the shorted pad of PR1008 to find out what is getting hot. Dont inject more then 1V , else SOC may be killed if there is shorting on high side mosfet. Better check physically all high side fet for shorting also before injecting voltage.

Hi, I have a question , is there a way to check MOSFETS working 100 percent sure while mosfets are still on board.
Most DMM(Multimeters) will not show forward bias voltage (0.5---0.6v) while board power off . Multimeter shows only values at continuity mode of DMM
i-e 150 to 396 etc (it shows resistance or volts)?. what is this value sorry for being dumb.

. High price DMM show even voltage values as mentioned above ( 0.5--0.6v) but most cheap DMM show only values which i mentioned above( 200--400).

Secondly Is it save to plug in power 19v power on motherboard while PR ( big fuse) is not present , i do not have DC power supply and will take time to get one.

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

If you dont have Dc supply, dont mess with it as it'll be practically impossible to found shorted component. Learn basics of laptop repair first. We cant teach you here.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

If you dont have Dc supply, dont mess with it as it'll be practically impossible to found shorted component. Learn basics of laptop repair first. We cant teach you here.

Hey,dont be so rude ,have a cup of tea.

In this forum beginner guide ,It is written choose option 2 if you want to learn about fixing laptops and i am in situation no 2.

https://www.badcaps.net/forum/showthread.php?t=88758

if you do not want to help do not reply, other members will help if you do not want to help

[mcplslg123]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

I'm not being rude, rather telling you what is in your best interest. Without knowing the basics you will end up damaging mb rather then repairing it specially with SOC mb's. this forum cant teach you basics even though you can learn a lot from here provided you know the basics. Anyway, lets others help you.

[stingerchamp]

Re: Need help, HP omen ax236tx , no boot capslock blink 5long 3 short

Problem resolved, vccsa coil supply was missing 0.95v.
Replaced pq4012 and laptop working