Satellite L755-S5216 QUANTA BLB Schematic

[dspok]

Hello, I have said Toshiba laptop. When I press power button It turns on for 2-3 seconds and then turns off. Repeats same thing all time.
BIOS seems to be good.

Can anybody help to solve this problem also please share schematics.

Thanks in advance.

[dj_ricoh]

Re: Satellite L755-S5216

Mine does the same. Did a reflow because of nvidia chip.
But i did not solder back the bios battery.

I did not had a new one so it powers up then shutdowns after 2 sec.
When its ok the toshiba logo lights up.

[dspok]

Re: Satellite L755-S5216

Thanks for clue @dj_ricoh but this model doesn't have nvidia chip its intel version.
And I also have Inspiron 660 board which does have the same problem.

Can't figure out the problem.

[Joseph cauchi]

Re: Satellite L755-S5216

I think you are mistaking the CPU with the GPU
Intel is the CPU normally reflow is done to the GPU invidia
The reflow is for you do not know for how many day or weeks
I suggest rebaling the GPU or replace with new .

[dspok]

Re: Satellite L755-S5216

@Joseph cauchi
No its intel core i3 1st generation cpu. no nvidia chip.
Only southbridge and cpu is available in this board.
Changed cpu no result but didn't reflow southbridge as I have already tried reflow and reball on Inspiron 660 with same issue which didn't get fix.

[looofy]

Re: Satellite L755-S5216

what is the motherboard platform ?

[hansie55]

Re: Satellite L755-S5216

Hope it helps

[Joseph cauchi]

Re: Satellite L755-S5216

Dspok
If the graphic is integrated in the CPU I think you should reball the southbridge.
Try this heat gun for 120 c for 3 minute cycling on the southbridge 3cm above no more then connect every thing and try motherboard on bench if it work you need a reballing if not consider of changing the board.