Hi.
ok on U14 i have all the volatage around, and i have 1V8 AON working.
in fact i didn't check correctly before, and i have the 1V8 working.
So .. seems that i have all voltage working properly.
the GPU is heating as soon as it start and the fan are running full speed also (not always)
so i'm not still sure if i had to go to the conclusion that the GPU is the problem ?...
totoFR37
Member
Last Activity: 06-21-2025, 01:10 PM
Joined: 05-31-2025
Location: Tours
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Thanks for helping.
I took 1V8_AON ( n°5) and FP_ FUSE (N°1) on U 14.
this is very close to the GPU on the back of the motherboard.
schematics come from the 17E51-Rev 1.0 MSI motherboard.
A lot of things are connected to 1V8_AON. i don't really understand the goal of this signal. Seems that it could "down" by a lot of the GPU I/O in case of problem.
resistance measurement of 1V8_AON is 88kohms to the GND.
...Leave a comment:
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I just soldered some wire on the back of the motherboard in order to try to check few more voltage.
FP_FUSE : 1.84 V
1V8_ AON : 0V
FBVDDQ : 1.31V
If i understand well :
FBVDDQ is ok that's mean the Vram have power. is 1.31V the correct voltage ?
1V8_AON is used with many GPIO, i'm not sure for what it is used. Some kind of Alert when it's down ?
All the others are working great, PEX VDD, FB-VDD, 1V8, 3V3, NVDD
Please give me some light in this dark tunnel...Leave a comment:
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I saw that on the HP computers, switch off the hybrid mode will put the biggest GPU always ON and stop the discret graphic.
It seem this problem is well know for bricking these computers.
But anyway people seems to have good result updating the BIOS for the lastest revision.
Is you computer starting and just showing any pictures ?
Or nothing is moving (brick)
it's useless to try to use the HDMI port.
But maybe if you plug an USB-DVI or USB-HDMI converter on the side USB you will probably get something, that will give you an access.
...Leave a comment:
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More measurements yesterday :
PEX_VDD : 1.06 V
1.2DIMM : 1.25V
PBVDDQ : 12 V
PWR_SRC_NVDD : 1.31V
NVDD : 0.9 V
Still missing some voltage, they seems to be on the other face of the PCB (under) so i don't know how to switch on the computer and make this measurement on the same time.
I think the GPU become hot very quickly, i'm not sure that's normal.
So the tests i want to do are :
_ is the GPU have the autorization to start ?
_ are the RAM have power supplies working properly.
_ is there any short...Leave a comment:
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I have a tought ... seems that on a Laptop the Vbios is integrated in the same bios chip than the motherboard is.
So i wonder why GPU-z is not finding the Bios revision.
GPU Z is just reading in the Bios chip i suppose.
If the GPU was not starting, then it will not be recognized, but we can see it.
The Vbios is not related to the GPU itself.
It something strange that i don't understand.
If someone can guide me ...
thanks guys...Leave a comment:
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made some checking this week-end :
I have the following voltage :
12.0 V
5.14V
3.36V
1.8V
I don't have anything on the 1V8_AON that seems related the PGOOD and FUSE circuits.
the gpu is hot.
when i go the the device manager and switch off the Nvidia, the voltage became 1.25V on the 1V8_AON.
i don't know what to think about these tests.
seems that nothing happen !
is it coming from the mats/ mods revision ?
Or is it because my GPU is not starting...Leave a comment:
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Long time ago, i was working in the hifi for a manufacturer, and the aftersale guys had full documentation for everyproducts with all the datas and compenents reference, schematics, even some texte explaining how each part of the board was working.
This documentation was available for the repair station technician.
Is all of this over or not existing for computer and new electronic stuff ?...Leave a comment:
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ok thanks for your analyze and advices.
i will first check the other rails to be sure.
I just had a look what is Mats / mods, ok will try that also and let you know.
thank you....Leave a comment:
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Ok sorry I understand, just came back home.
FBVDDQ is 33 ohms(probably not a short then)
NVVDD is 0.4 ohms
I check my multimeter measurement cables and they are 0.2 ohms themselves....Leave a comment:
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Ok sorry it's maybe a bit confuse. Just starting to learn, so i am throwing what i'm finding until i can know enough and connect the data together.
So starting again from Zero.
MSI GL75 9Se have an additionnal Nvidia RTX 2060 GPU.
This GPU is not working.
Using GPU-z we can't see any BIOS or Clock frequency. But the GPU is recognized.
Windows indicate in the device manager " this device have a problem, must be stopped" with a code 43 indicated.
We have first try to update all drivers and GPU bios like it's...Leave a comment:
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sorry made a mistake "the short still on the line but there is NO short at the mosftet output".
thanks to guide me....Leave a comment:
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I made some test yesterday night, board on the bench with no power supply on it.
I found some short on :
_ FB VDDQ
_ NVVDD
All the caps of these 2 lines are on short.
From what i understand, that seems to be 2 high power supplies rails for the GPU and the Rams, right ?
I didn't found any short on the 1V8 line.
So what i did is to remove the choke 4, 5, 6 (on NVVDD line) to separate the mosfets from the power line. the short still on the line but there is short at the mosftet output.
I also removed the chock...Leave a comment:
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MSI GL75 9 Se Nvidia GPU code 43
Hello guys.
I own an MSI GL75 (i7)
Motherboard : 17E51
GPU : Nvidia 2060 RTX
I spent weeks to install and clean the drivers but still have an code 43 and the Nvidia GPU not working.
When using the GPU-z the GPU is recognized but there is no clock frequency.
Seems the problem is from the hardware.
What do you advice me to check ?
Thanks -
hello guys,
I'm Thomas 45 from France.
I learnt electronic at school.
Now want to learn how how to repair a motherboard.
Thanks for your help guys....Leave a comment:
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