Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV:D / doesn't start

[sebuncle]

hi,
this plateform is i3 , intel HD
when i press power button , the power led switch on when i released button it switch off , no other reaction
Battery is charging
i take voltage
PL5= 16v (with battery)
PL7= 0v
PL8= 0v
PL9= 0v
PL10= 0v
PL11= 3,3v
PL12= 5v
U22 have 3,3v
i tried other bios and chipbios.

can you help me please
Best regards

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Do u have the schematic for the motherboard to start with?

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Hi ,
yes i have but i don't know what i have to check .

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Start by checking resistance to ground at coils. Then SUS_ON and 1.5v_SUS. Last one at Q12 and PU4. Also at PU4 check voltage VCC pin 12.

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Hi i checked
SUS_ON on pin 80 (NPCE885L) there's no voltage.
PL7 = 2 Ω
PL8 = 2 Ω
PL9 = 57 Ω
PL10 = 2 Ω
PL11 = 180 Ω
PL12 = 146 Ω

Q12 =0v all pin
SUS_1,5v =0v
PU4 pin 12 =5v
PU4 pin16 = 0v

Best regards

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

How did you measure the resistance at coils!!

Well SUS_ON 0v at PU4,
What voltage do you get at VREF, REF IN and PGOOD at PU4.

My mistake I meant voltages at PQ12 not Q12, even though SUS_ON is missing.

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

How did you measure the resistance at coils!!

Well SUS_ON 0v at PU4,
What voltage do you get at VREF, REF IN and PGOOD at PU4.

My mistake I meant voltages at PQ12 not Q12, even though SUS_ON is missing.

i check coils between ground it's not correct ?
VREF, REF IN and PGOOD have all 0v

PQ12 see photo


Best regards

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

No SUS_ON, Or other voltages at PU4, check VCC, AVCC and VDD at NCPE885.

But strange thing is that almost all of your coils are with low resistance to ground.

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

No SUS_ON, Or other voltages at PU4, check VCC, AVCC and VDD at NCPE885.

But strange thing is that almost all of your coils are with low resistance to ground.

i checked on KU2
VCC 0v (pin 4)
AVCC 3.3v (pin 102)
VDD 3.3v (pin 115;88;76;46;19)

Best regards

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Check voltages at PQ19, and both sides of PR96

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

Check voltages at PQ19, and both sides of PR96

Hi,
PQ19 and PR96 have no voltage ,
but if i push one time power button 3.3v comes on pin 5,6,7,8 of pq19

Best regards

[tibd]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

hi,
this plateform is i3 , intel HD
when i press power button , the power led switch on when i released button it switch off , no other reaction
Battery is charging
i take voltage
PL5= 16v (with battery)
PL7= 0v
PL8= 0v
PL9= 0v
PL10= 0v
PL11= 3,3v
PL12= 5v
U22 have 3,3v
i tried other bios and chipbios.

can you help me please
Best regards

As of your first post PL11 with 3.3v. How is it possible the PQ19 only have 3.3 at drain (pin 5,6,7,8) when you press power button. Pins 5,6,7,8 are connected to same power rail with PL11. Did you mean that above voltages you measured are only with pressed power button or at S5 state???? If so then it was misleading.

[sebuncle]

Re: Sony vaio SVF1521C2EW /DA0HK9MB6D0 REV / doesn't start

As of your first post PL11 with 3.3v. How is it possible the PQ19 only have 3.3 at drain (pin 5,6,7,8) when you press power button. Pins 5,6,7,8 are connected to same power rail with PL11. Did you mean that above voltages you measured are only with pressed power button or at S5 state???? If so then it was misleading.

Hi
i checked again ,
so when i only plug motherboard PL11 have 3.3v but after 20 second it goes to 0v.
I hadn 't paid attention to this detail.

Best regard