toshiba c660 cpu_core problem

[menshawy]

hi all friends
i have problem with toshiba c660 la-6842p
at first i found pl5(+5valwp) is short to GND after replace pu6(51125),pu15(ADP3211),PU13(62883C),UA1(alc259) MB POWER on ok and ups apm is 0.4 with no display then shutdown after 20sec
all basic voltage are ok Except cpu core
pl12 AND pl14 is 0.7 v
i found a resistor is connected to pin15 and capacitor is connected to pin14 and i didn't found them on working m.b
i removed it with no result

all voltages i this table (S0 state ) is ok Except +CPU_CORE IS 0.7V but the correct volt 1.25v-i think that- (i3 cpu)
i tried to change pu13 more than 3 times with the same result
pu13 important volts
pin1 pgood 3.3 ok
pin16 VDD 5v ok
pin17 vin 19v ok
pin38 vr_on 3.3v ok
any one can help me ?
thanks for all

[piernov]

Re: toshiba c660 cpu_core problem

CPU VCore voltage can go down below 0.8V when power management is active.
Right after turning on the machine it usually starts at around 1V.

[Sephir0th]

Re: toshiba c660 cpu_core problem

The BIOS isn't Posting? (CapsLock Test)
If Not, i'd start with Flashing BIOS. Of course make a Backup of the present BIOS.

Any History of the Laptop? What have you done so far after solving the short? And what did you removed exactly?

[mcplslg123]

Re: toshiba c660 cpu_core problem

Maybe ADP3211(Core PWM) you replaced is defective. Why you replaced so many parts?? Were all shorted??

[caspian]

Re: toshiba c660 cpu_core problem

How much is the cpu-vcore voltage with another Sandy-Bridge CPU?

[piernov]

Re: toshiba c660 cpu_core problem

This is 1st gen not 2nd gen but of course another CPU must be tried before troubleshooting a motherboard problem as always.

[menshawy]

Re: toshiba c660 cpu_core problem

CPU VCore voltage can go down below 0.8V when power management is active.
Right after turning on the machine it usually starts at around 1V.

thanks

[menshawy]

Re: toshiba c660 cpu_core problem

The BIOS isn't Posting? (CapsLock Test)
If Not, i'd start with Flashing BIOS. Of course make a Backup of the present BIOS.

Any History of the Laptop? What have you done so far after solving the short? And what did you removed exactly?

thanks
i already programed bios

[menshawy]

Re: toshiba c660 cpu_core problem

Maybe ADP3211(Core PWM) you replaced is defective. Why you replaced so many parts?? Were all shorted??

thanks
i already changed ADP3211 and it has 0.9v ok