MS-16F2 ver1.2 bypass shorted PCB , partially Solved

[goodguy91]

Have msi685 laptop which started smoking and not turn on when plugged to ac power. Replaced and soldered new dc jack but short was inside PCB and it continue smoking when plugged

Removed PL1 PL2 PL3 and PC88(NEAR DC JACK) and cut dc jack + pole from entering pcb, soldered wire from dc jack + pole straight to PQ27 pin 1 and 2




Laptop now booting up and screen ok but i have blown fuse on right ec67 and it has short on another side, dont have any schematics what could it lead to?

[nbanti]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

I think that is not a fuse. It can be a Capacitor.

[goodguy91]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

anyone have schematics for this?

[dj_ricoh]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

Those are non polirized caps.

You can solder them every side you like.

One side will always be connected to ground as part of filtering process.

If both sides are shorted then you take it out and check with diode , capacity mode.

If it's good you inject voltage to the pad to find who is shifting to ground

[goodguy91]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

Ok thank you, no idea what caused this issue in the first place. ac adater wasnt bad and dc jack wasnt shorted, just suddenly trace from dc jack to resistors went bad

btw does bypassing pl1 pl2 pl3 straight to mosfet cause any issues later on?

[goodguy91]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

Its now charging battery and keyboard is also working i can get to bios.. but only when cmos battery is removed, i check it has 3.02v and when i connect it boots to black screen.

[Tennen]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

Hey there, sorry for reviving this thread, but I need your advice.
I recently received a "dead" notebook from a friend, which misses the complete power socket section. It was in "repair" shop once, I think they might have done more damage than anything else.


As you might be able to see, PL1-3 are missing completely, PQ27 is shorted on Pin 1-3.
The board is a 2.0, not a 1.2, but that should not be much of a difference.

Could you tell me if your fix is still working or - if not - which parts belong to PL1-3, so I can order them?

Best Regards

[Tennen]

Re: MS-16F2 ver1.2 bypass shorted PCB , partially Solved

As you might be able to see

Seems like the forum does not like DU, here is the image: