Toshiba Satellite c660 (only works on battery)

[rmps]

Hi guys,

I have a Toshiba Satellite C660 that only works on battery.
Power adapter is good, no 3.3v at power button.
Motherboard is a PWWAA LA-6841P.. (schematic attached below) https://www.badcaps.net/forum/troubl...rdview-request

Can someone help please?

[piernov]

Re: Toshiba Satellite c660 (only works on battery)

Check DCin fuse (PF1), PL1, check voltage on VIN, check DCin MOSFETs (PQ203 & PQ204), check current sense resistor PR215, check voltage on B+.
If voltage is present on VIN and not on B+, and PQ203, PQ204, PR215 are good, check voltage on P2 and on the gate of PQ204. The voltage on the gate must be lower by at least 6V to the voltage on P2.
If it's not, measure voltage on pins 1, 2, 8, 19, 20, 23, 24 of PU200
Btw G5209S31U is pin-compatible with ISL6251A

[rmps]

Re: Toshiba Satellite c660 (only works on battery)

Check DCin fuse (PF1), PL1, check voltage on VIN, check DCin MOSFETs (PQ203 & PQ204), check current sense resistor PR215, check voltage on B+.
If voltage is present on VIN and not on B+, and PQ203, PQ204, PR215 are good, check voltage on P2 and on the gate of PQ204. The voltage on the gate must be lower by at least 6V to the voltage on P2.
If it's not, measure voltage on pins 1, 2, 8, 19, 20, 23, 24 of PU200
Btw G5209S31U is pin-compatible with ISL6251A

Thank you for your help..
Here are my readings (without battery plugged in, only ac adapter..)

PF1 - 19.37v
PL1 - 19.37v
VIN - 19.38v

PQ203
pin1 to 7 - 19.38v
pin 8 - 19.34v

PQ204
pin1 to 4 - 19.38v
pin5 to 8 - 0.980v

PR215 - 0.980v

B+ - 0.980v

P2 - 19.38v

PQ204 gate - 19.34v

PU200
pin 1 - 5.065v
pin 2 - 1.393v
pin 8 - 2.393v
pin 19 - 0.978v
pin 20 - 0.978v
pin 23 - 0v
pin 24 - 18.98v

Already had swapped PU200 and PU500 but no joy.. Same readings

Thank you very much

[piernov]

Re: Toshiba Satellite c660 (only works on battery)

Check resistance between pin 1 and pin 4, and between pin 1 and pin 8 of PQ203.
Check resistance to ground of B+ line.

[rmps]

Re: Toshiba Satellite c660 (only works on battery)

Check resistance between pin 1 and pin 4, and between pin 1 and pin 8 of PQ203.

pin1 and pin4 = 422.7 ohm

pin1 and pin8 = 000.4 ohm

Resistance to ground from B+ = (innacurate reading) droping from 2.5 Mega ohm

[piernov]

Re: Toshiba Satellite c660 (only works on battery)

Replace PQ203, it is apparently shorted.

[rmps]

Re: Toshiba Satellite c660 (only works on battery)

Replace PQ203, it is apparently shorted.

OMG, so siiiimple....
How did i missed that?!

Thank you very much for your help, it worked..
Thank you millions