toshiba satellite c50 b 17r dead

[george_gpu]

hi from greece ,
i check power jack\power button\bios chip, i have voltage general in board and battery pins also
i think that problem is in plz03 ,plz04,pc623 & pc624 near cpu i have not voltage \ vcore ,i measure ohm with ground and i have short
i also measure dc the pqz01 and i have 19 volt only pin 2,3,4
board is :zbwaa la-b303p rev1
tell me where to look

[Techtiger]

Re: toshiba satellite c50 b 17r dead

pl03 & pl04,pc623 & pc624 when you measure what was the reading in OHM? So the MOB starts up but no image?

[george_gpu]

Re: toshiba satellite c50 b 17r dead

o ohm four of them
i have no power , no led in board

[Techtiger]

Re: toshiba satellite c50 b 17r dead

desolder one pad of each PLZ03 & PLZ04 (pc623 & pc624 output line of the 2 Coils) and test witch side of the line is Short to GND after than you have to trace it back if you have the Schematic upload here to help

[george_gpu]

Re: toshiba satellite c50 b 17r dead

good day
i try today
i found schematic from other member

[Techtiger]

Re: toshiba satellite c50 b 17r dead

Test your +B line PLZ01/PLZ02 for short

[george_gpu]

Re: toshiba satellite c50 b 17r dead

I remove plz03 & plz04 and it power on but with no display
Also The flex for keyboard must be not connected on board

[Techtiger]

Re: toshiba satellite c50 b 17r dead

PLZ03 & PLZ04 Line test witch side is Short to GND Ohm with out CPU CORE no Display that’s normal

[george_gpu]

Re: toshiba satellite c50 b 17r dead

I think i found front of pu350 a short capacitor
(A little one)
Can you Please tell me the value
Also confirm value of plz03&plz04
(R22a 7j 512) is 0,22uh 24a?

[Techtiger]

Re: toshiba satellite c50 b 17r dead

I think i found front of pu350 a short capacitor
(A little one)
Can you Please tell me the value
Also confirm value of plz03&plz04
(R22a 7j 512) is 0,22uh 24a?

for the plz03 & plz04 test continuity with the help of multimeter I think those are good it's not you problem ,Test your +B line PLZ01/PLZ02 for short with the help of multimeter in Ohm

[george_gpu]

Re: toshiba satellite c50 b 17r dead

i test this afternoon and i tell you

[george_gpu]

Re: toshiba satellite c50 b 17r dead

Plz01 k plz02 with ground 537 show both sides

[george_gpu]

Re: toshiba satellite c50 b 17r dead

Another strange thing i forgot :When i put flex of keyboard dont power on when i take it off power on with no display

[Techtiger]

Re: toshiba satellite c50 b 17r dead

Plz01 k plz02 with ground 537 show both sides

now test PLZ03/PLZ04 both sides for with the help of multimeter
for the moment don't' connect the Keyboard we will come back later for that
look at the pic and test all that points