Toshiba Satellite C660D-1C7 No Power Up

[magneh]

Hello!
I have the referred laptop with a PWWBE LA-6849P rev2 motherboard.

The mobo doesnt power up when I try to turn it on, and when I connect the charger, no green light.

So I removed the board to try to isolate the problem.
The 19V are present at the DC conector and the fuse is OK also.

To try to isolate the line where the short is, which jumpers should I dessolder?
There are several of them and I'm kinda lost

Some photos and manual in attachments.

Thanks for your guidance!

[khaahk]

Re: Toshiba Satellite C660D-1C7 No Power Up

Why do you think it is a short?

[magneh]

Re: Toshiba Satellite C660D-1C7 No Power Up

Hello!

I'm assuming the board doesnt light up the green light neither powers up due to a short.

Could it be just a faulty GPU that needs reflow?

[orientalsniper]

Re: Toshiba Satellite C660D-1C7 No Power Up

I'm kinda new to this but you should check you have 3.3V (power button) and 5V, also voltages in your BIOS pins. Also if I'm not wrong the LED's are controlled by the KBC/SIO chip.

[magneh]

Re: Toshiba Satellite C660D-1C7 No Power Up

Yo guys,

Been a while without taking this board again to work on, but here I am.
Started by mesure some coils and I found out that PL332 was shorted to ground as PC332 just on the side.
Removed both of them, and found out that PL332 has 0.04ohm (its Ok I suppose) and that PC332 was also ok, but I broke one leg when removing, so now its NOK. Forward.
The short was on the PC332 terminals and so, as found in the schematic, the +3VALWP line is shorted to ground, because the other side of PL332 reads open.
At least I think I found the way to go.
+3VALWP comes out from PJ332 (who is also shorted to GND), and so +3VALW line is shorted.
This takes me to page 33/38 0f the schematic. PU75 delivers the +3VALW.
PC277 seems OK.PC276 also.

Some components arent labeled, but if C275 is the one on the left of PU75, I read 0.05ohm on both sides, so I think he's shorted. (see pic attached).

Tomorrow gonna remove it since is getting late and I'll post results.
Share some thougts if you guys see that I'm missing something

Cheers

[magneh]

Re: Toshiba Satellite C660D-1C7 No Power Up

Well removed that cap and both terminals are shorted.
That little cap aint the responsible.

Still havin´ the short on 3VALW line...any thoughts where should I look next?
Now I'm on page 33 looking at PU75. I'm on the right way?
Thanks!