• msi modern 15A11M not works

It is currently 4 May 2025, 01:26

msi modern 15A11M not works

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#1 msi modern 15A11M not works

by Fabrizio • 16 March 2025, 21:19
Hi
I have a Msi modern notebook 15A11M-217XIT-GG51135U8GXXDXX
with mainb ms-15521 rev 1.0....that doesn't start, no LEDs on, black screen.
I'll start by saying that I don't have the wiring diagram or even a boardview. I can't find it online
Pls can someone help me?
Thank
Fabrizio

Re: msi modern 15A11M not works

by Google Adsense [BOT] • 16 March 2025, 21:19

#2 Re: msi modern 15A11M not works

by Vogelek23 • 17 March 2025, 15:11
No documentation available for this PCB at the moment. Please post a clear, high resolution photos of both sides of your PCB, after removing all films which may have covered the components.

#3 Re: msi modern 15A11M not works

by Fabrizio • 19 April 2025, 09:05
Image
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#4 Re: msi modern 15A11M not works

by matic • 28 April 2025, 13:45
Hello!

Measure the resistances and voltages to ground on coils marked "3R3" located near the battery connector.

#5 Re: msi modern 15A11M not works

by Fabrizio • 2 May 2025, 16:35
Hi, Matico I performed the resistance measurements and they are ok 3.3 OHM and in the attached photo I send you the values ​​of the measured voltages
Thanks
p.s.: on the other hand, the 3.40v 3R3 has 2.50v

Image

#6 Re: msi modern 15A11M not works

by Vogelek23 • 3 May 2025, 11:59
Fabrizio wrote:I performed the resistance measurements
But it seems not in reference TO GROUND but rather BETWEEN the pins of coils, which is definitely not what Matic has asked for. I also believe that your multimeter is not good if it measures 3,3Ω at such coils, as their DC resistance should be around 0,02Ω.

Fabrizio wrote:on the other hand, the 3.40v 3R3 has 2.50v
When you measure at switches side of the coil, it is not a DC voltage but rather a high frequency voltage PULSES, which many of cheap and low quality multimeters cannot measure correctly (in rare cases you may even destroy the multimeter's A/D converters). That's why the only correct way of measuring voltages on such coils is to measure them at the OUTPUT side of step-down converter (at the filter capacitors side). But it should be obvious for someone whose experience level has been set to "advanced".

Because the stand-by voltages are present, the next step is to check whether there is a 3,3V voltage to ground on the power button and it goes to 0V when the button is pressed.

#7 Re: msi modern 15A11M not works

by Fabrizio • 3 May 2025, 15:06
-First of all I have to apologize... I'm a BEGINNER... I've already corrected the profile, I didn't notice the wrong selection.
-I have to admit that my tester is not professional.
-the switch and a key on the keyboard...and here I see it very difficult to find the 3 volts without knowing which pin it refers to, not having an electrical diagram.
Anyway, if anyone has suggestions, I'm always ready to receive them

Re: msi modern 15A11M not works

by Google Adsense [BOT] • 3 May 2025, 15:06
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