MSI GF63 MS-16R41 powers on then nothing.

[bociub]

Hi there,

Given a laptop. It was unrealible, however repeating switching off then back on always brought it back to life for a while. Now, if I press the power button it consumes 40mil and the light is on, on the power button, but noting else is happening, about a minute later it swithes off by on its own. When the board is disconnected from the power I did not found any short or suspicius reading or component. When the board is on the right voltages present on the right place apart from the coils of the cpu where no voltages at all. The ISL95855C chip gets the 5 volt and shorts the enable pin to ground as on the picture. It is only shorted when the board is on. I ordered the chip and the newone doing exactly the same. As I supposed that this chip should open the gates of the drmoses if gets the 5 volt and the 3.3 , I do not have any idea where to continue. Is anyone have furher idea, or a ducomentation, how this chip sholud power up, why shorts the enable pin?

thanks

[mcplslg123]

When consumption is at 40mA, why un-necessarily poke at core circuit?

Check basic things first. Ram voltage must be present for core to turn on. Is 1.2V/2.5V present?

What about 1.0V/1.8V rails?

[bociub]

So, Actually, When the board is ON, The ISL95855C chip shorts the pin 47 to the ground not the 48(marked wrongly on the picture.) the other end of that 10k resistor is the main 3.3v.

After pressing the power button, no voltage on the cpu's coils, gpu, gpu-s vram, gpu's bios chip's coil, screen's coil, all other voltages present, but the board does nothing. It takes 40 mil instantly and no change for about a minute when the board switches off and falls to 0 amp.

Does anyone have a schematic or pinout for that ISL chip? Actually, this short is the only suspicious thing what i found on the board. I had to poke a lot to find it.

What is the symptom if the crystal stopped working in the clock?

[pc_okay]

Hello,

This shematic have the same ISL95855:
https://www.badcaps.net/forum/troubl...r-ms-16jb1-1-0

If the 32.7khz crystal is bad you'll miss SLP_S4 and all the next signals and voltages.
You battery may not charge too: battery can't communicate with IC charge without clock. (and IC charge with SIO)

[bociub]

Thanks. It is charging fine. I followed your link and I also found the board view on the google. I also wrote a new bios onto it but everything is the same.

On the ISL chip the "all power ok" signal is missing(pin48 0v). It is connected to the ec chip and to many more places and I supposing that the EC chip is working, just because the charging working, when the board on then basic voltages are present and I can switch the board on and off. After taking a look on EC's pinout it has two pins with ~pch-power-ok. On the top of the chipset every single capacitor has voltages when the board is on, however on the EC, the pins related to the pch-power-ok are all 0 volts. On the chipset coil 59 ohms. Nothing looks wrong with the chipset too however it has power and does nothing too. Can it be dead like this? i have tried to heating up, pushing down but nothing has changed.


Is this board should come on on its own after a bios reset like lenovo or dell boards?

[pc_okay]

Just to be clear this IC (ISL95855) is not the charging IC, it's the IC that control VCORE chips. (To Power cpu)
This IC need enable signal to start, pin 48, without it IC Will not work and so no power for cpu…
(Cpu core voltage come after chipset, ram voltage and other…)

So you need to go backward in the power séquence.
If you have the right boardview look for pm_slp_s4 and s3.
And Check their voltages, it's a Good start.

Check With other ram too please. One slot at a Time reverse slot…

[mcplslg123]

Post#2 & post#6-same advise. Still not convined dear friend that your problem is not missing Vcore.

You can only get the right direction from us but definitely one has to do a lot of homework to get it fixed.