Re: Current leakage MS-16J91
Hmmm ok, thank you piernov ! Will earth the ac and chcek on the leakage !
trufla
Busy bee
Last Activity: 03-29-2021, 06:14 AM
Joined: 03-04-2021
Location: Seoul
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Current leakage MS-16J91
Hello !
Got a dead laptop not turning on due to shorted main power delivery rail mosfets. The mosfets have been replaced and the laptop turns on and posts now but here comes the train... Now there is a current leakage somewhere... I can feel the electricity when i touch the heat sinks ... Note: heat sink screwed in to the boards ground. Any idead where to look for a cause of this issue ?
Any input much appreciated !
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Re: MSI GL62 7RDX not charging, not powering on
Aha another lesson learned. Acknowledged will desolder both mosfets and measure them as instructed shortly !Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
Hello !
Alright, so did as instructed and:
Mosfet 1 - 4309 RSACP
Mosfet 2 - 4413 BA652Z
Diode mode test.
Mosfet 1
Pin 1 -> 4 = 16.07
Pin 1-> 8 = nothing
Mosfet 2
Pin 1 -> 4 = nothing
Pin 1 -> 8 = 6.7
Mosfet 1, Pin 1 to 8 resistance - 0.400
Btw, thank you so much mcplslg for your guidance ! Im learning a bit more with your every reply
thank you thank you !
Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
Alright, done as instructed and the readings are as follow:
Mosfet 1
Pin 1 - 19.7
Pin 4 - 7.6
Pin 8 - 1.4
Mosfet 2
Pin 1 - 0.9
Pin 4 - 0.73
Pin 8 - 1.4Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
Also not sure if its very visible on the photo provided but seems like the first mosfet looks a little bit defferently from the other two nearby (almost like browned a bit).Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
All of the above of course if im checking them correctly that is. Check pin 1 -> plus to ground minus to pin 1. Pin 4 -> plus to pin 1 minus to pin 4. Pin 8-> plus to pin 1 minus to pin 8.Last edited by trufla; 03-05-2021, 03:40 AM.Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
There is one more mosfet next to them followed by two chokes and the readings on its pins are :
1. 0.4
4. 0.1
8. 0.0Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
If im correct the secondary mosfet is the one thats next to the 1st one. So the readings from it are as follows:
Pins no:
1. 3.7
4. 0.2
8. 0.2Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
[url]https://ibb.co/4MfCHJB[/url]
Ok so i went ahead and tried to follow as instructed, pretty hard to figure out which one is which because the of the board color hard to follow tracks.
So ... If im correct the one marked on the photo attached should be the first mosfet and the readings on its pins are as follow:
1. 19.7
4. 10.4
8. 18.3
Trying to figure out which one is the secondary, will post.results shortly.Re: MSI GL62 7RDX not charging, not .../4MfCHJB[/url]Leave a comment:
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Re: MSI GL62 7RDX not charging, not powering on
Hello ! Thank you for prompt response ! Ok so i have the mobo opened and no there was no liquid spillage on it and no signs of corrosion/rust on any of the components inside. Seems like the mosfets are on the other side of the board will try removing it and measuring the voltage on them soon.Leave a comment:
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MSI GL62 7RDX not charging, not powering on
Hello !
First of all would like to say hello to everyone here and thank you to the creator of this forum for making such a place These days not much places where kind souls willing to share their knowledge still residue remains
Not sure where to start so i'll start from the beginning.
About a year ago it was a day like other when i got some time off from being a husban and a chance to play some pc games siping some brown ale, not wanting to waste preciouse time, wiped dust of my laptop and turned it on. Then launched astroneer and went to mine some...Last edited by trufla; 03-04-2021, 12:39 PM. -
Re: New Members - please post your introductions here
Hello !
Newbie here Seeking knowledge and mastery of new akills Just a humble dude from Poland living and working as a technician at the server data center in Seoul.
Looki g forward to meet new ppls and gain some exp
ChearsLeave a comment:
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