Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

[Lykos]

Hello. I have the laptop of the title for which I can't find any info at all...
It suddenly stopped working (no power at all).
I located a chip overheating and by removing it the laptop POSTed, but (not suprizingly) did not boot into OS.
The problem is that the said chip is something I have never seen before and couldn't Identify it.
The markings are MPPD 8694 1456 C

Any help would be really appreciated.Thank you in advance!

[Sephir0th]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

That's a MP86941GQVT-Z, a integrated controller from Monolithic Power Systems.

From where did you remove it? You probably have a important power rail missing right now, so I'm more surprised that it even does the P.O.S.T. ...

[Lykos]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

That's a MP86941GQVT-Z, a integrated controller from Monolithic Power Systems.

From where did you remove it? You probably have a important power rail missing right now, so I'm more surprised that it even does the P.O.S.T. ...

You're a life saver!

I was surprized too that it P.O.S.T.ed, and even showed the boot menu of my USB drive. I couldn't find schematic, so I have no idea what's its purpose...

Thank you big time!

[Sephir0th]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

Check resistance to GND of all four coils in this row. Want to know which coil belongs to what. You have removed 1 phase either of VCore or of GFXCore. However, this explains why it basically works, at least till some extent.

[Lykos]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

all of them have about 19 Ohms to GND. The third coil from the left is clearly the one connected to the controller I removed. I'll order a controller and update when I have it replaced

[repcell]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

Greetings, I have the same machine, but the tracks of the same circuit were damaged but the one next to it, could you make a connection diagram?

the broken lines are those of the black arrow

the pc is in short circuit

[repcell]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

Greetings, I have the same machine, but the tracks of the same circuit were damaged but the one next to it, could you make a connection diagram?

the broken lines are those of the black arrow

the pc is in short circuit

This is the damage

[Kevlopezc]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

This is the damage

hello, i have the same problem in the same point of the board, did you get any solution?

[Sephir0th]

Re: Lenovo IdeaPad Gaming 3 (15ARH7) - HLG50 LA-M082P rev. 1A

Make sure the CPU isn't dead already, then track repair. These is advanced stuff, of course. You need to get rid of the burned layers and carbonised stuff and also have to restore the Pads, which needs tons of experience. The CPU might run with one Phase missing, but no garantee.

[michoteuber]

Hi, what componente is "PUF1" ??

[gurj1979]

Hi, what componente is "PUF1" ??

Same with I've got from customer.
PUF1 is heating up on thermal camera.

Here is a pic of the part. Looks like it says VtERF

[gurj1979]

Google shows that is is SY8843QWC Vt QFN7

[gurj1979]

The bad news, that points directly to the CPU. Chances are the CPU is dead and shorted.