Comments on: How To Repair No Power Symptom In Asus X555LD Laptop https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sat, 03 Dec 2022 06:53:36 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-398339 Sat, 03 Dec 2022 06:53:36 +0000 https://jestineyong.com/?p=14369#comment-398339 In reply to Thejatha Senavirathna.

I'm glad that it helped you Thejatha!

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-398338 Sat, 03 Dec 2022 06:52:09 +0000 https://jestineyong.com/?p=14369#comment-398338 In reply to Mark Plessers.

Glad that you were able to fix your Asus with this article Mark!

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-398337 Sat, 03 Dec 2022 06:48:01 +0000 https://jestineyong.com/?p=14369#comment-398337 In reply to Albert van Bemmelen.

Maybe this servicemanual of a laptop that also uses the same M0930 N-channel mosfets in a same way helps you further?
http://www.rom.by/files/1bc0e_asus_ux31a2.pdf

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-398336 Sat, 03 Dec 2022 06:42:01 +0000 https://jestineyong.com/?p=14369#comment-398336 In reply to Hassan.

Sadly I can not tell you what they are because the fixed laptop went back to its owner. And we didn't find any matching schematic either.

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]]> By: Thejatha Senavirathna https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-375264 Mon, 05 Jul 2021 04:16:34 +0000 https://jestineyong.com/?p=14369#comment-375264 thank u sir!

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]]> By: giulio https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-373666 Sat, 13 Mar 2021 00:20:57 +0000 https://jestineyong.com/?p=14369#comment-373666 In reply to Albert van Bemmelen.

Hi, can you give us the correct voltage in every pin for this chip? I tested the two original and I have 19V in all pins but one that is 24V. Is it possibile? Is it a bad chip or good one? Thank you so much

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]]> By: Mark Plessers https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-372153 Sat, 21 Nov 2020 15:20:04 +0000 https://jestineyong.com/?p=14369#comment-372153 I had a identical issue on an ASUS. Just 3V after the first mosfet. I was about to bridge and/or replace the first mosfet when I came across this page (in search of the fet-specifications). Measuring the second mosfet, it was 6 Ohm... (in off-state). So this indeed was the cause of "no power".

So this saved me replacing both fets. I squeezed in a 40V 60A part that was slightly bigger than the M0930. Hope it keeps the tablet alive a little longer...

Thank you for the report!

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]]> By: Hassan https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-368553 Fri, 08 May 2020 18:36:04 +0000 https://jestineyong.com/?p=14369#comment-368553 Hello dear Albert
My question to you is that before MOSFET,there are three parallel capacitors,what is their value to farad and voltage?Thank you.

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-357698 Sun, 19 May 2019 20:57:36 +0000 https://jestineyong.com/?p=14369#comment-357698 In reply to Matias.

Matias, just use the mentioned P0903BEA n-channel mosfets and you'll be fine! We couldn't find MO930M mosfets.

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]]> By: Albert van Bemmelen https://jestineyong.com/how-to-repair-no-power-symptom-in-asus-x555ld-laptop/comment-page-1/#comment-357697 Sun, 19 May 2019 20:54:42 +0000 https://jestineyong.com/?p=14369#comment-357697 If those tiny mosfets are defect must be measured outside of the board. In-circuit is practically impossible to determine if they are defect because other components passive or active influence the measurement. You can simply do that with your DMM by switching the + (red) and - (black) wires between source and gate and check in continuity/diode beep test if source and drain can be completely closed and opened while changing the polarity on gate and source. So if there is a small resistance left is not comfirming anything. And bridging over the mosfet is not safe because it can cause exploding battery packs and other damages. The mosfets are there for safety reasons!

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