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	Comments on: Dell Latitude E7440-P40G Laptop Repair	</title>
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	<description>Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More!</description>
	<lastBuildDate>Mon, 03 Jul 2023 17:48:26 +0000</lastBuildDate>
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		<title>
		By: Bipul		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-403672</link>

		<dc:creator><![CDATA[Bipul]]></dc:creator>
		<pubDate>Mon, 03 Jul 2023 17:48:26 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371011&quot;&gt;Albert van Bemmelen&lt;/a&gt;.

Hii,,sir my laptop Dell latitude e7440 shot this capacitor,,I remove this capacitor,my laptop battery is still running my laptop and work,,but power adapter not working,,I have two adapter,same problem,
How can I bypass charging line,,]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371011">Albert van Bemmelen</a>.</p>
<p>Hii,,sir my laptop Dell latitude e7440 shot this capacitor,,I remove this capacitor,my laptop battery is still running my laptop and work,,but power adapter not working,,I have two adapter,same problem,<br />
How can I bypass charging line,,</p>
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		<title>
		By: Stephan		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-401463</link>

		<dc:creator><![CDATA[Stephan]]></dc:creator>
		<pubDate>Fri, 14 Apr 2023 11:17:23 +0000</pubDate>
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					<description><![CDATA[Thank you for the detailled description. I&#039;m facing the same issue. How did you figure out the dimension of the capacitor since there is no hint on the board and the capacitor itself?]]></description>
			<content:encoded><![CDATA[<p>Thank you for the detailled description. I'm facing the same issue. How did you figure out the dimension of the capacitor since there is no hint on the board and the capacitor itself?</p>
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		<title>
		By: Juozaz		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-398766</link>

		<dc:creator><![CDATA[Juozaz]]></dc:creator>
		<pubDate>Tue, 20 Dec 2022 15:52:31 +0000</pubDate>
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					<description><![CDATA[Thanks for You knowledge share, its help me to start analog repair on HP ElitePad 900 dockstation by shorted capacitor, mosfets was survive :)]]></description>
			<content:encoded><![CDATA[<p>Thanks for You knowledge share, its help me to start analog repair on HP ElitePad 900 dockstation by shorted capacitor, mosfets was survive 🙂</p>
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		<title>
		By: Hein van den Heuvel		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-372061</link>

		<dc:creator><![CDATA[Hein van den Heuvel]]></dc:creator>
		<pubDate>Tue, 17 Nov 2020 00:58:34 +0000</pubDate>
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					<description><![CDATA[Thanks for the great article and especially the link to the schematics.
I was all but ready to toss our 7440 when prompted by your article and the (by comparison extremely amateuristic, and excessive long) youtube video : https://www.youtube.com/watch?v=9GXX5hdk-Oo&#038;t=1715s
Aside - why do folks seem to insist making us sit through videos where a few well written paragraphs and a picture or two are so much more effective!

Anyway, in my case the capacitor you indicate with the green error seemed to me the only thing broken. The caps there are all in parallel, so it is hard to measure without removing. The reason I removed that one, and only that one had the slight suggestion of a crack in the plastics part - much like is visible in your picture with the orange error.  

These capacitor parts are exposed through the shield ... for anticipated  repairs, or to prevent shortcircuits of the thick components against the shield ??
Since they are in parallel, and there are many, and two right next to it, and encouraged by the youtube above, I merely removed it without replacing.

Unfortunately I was too anxious and too sloppy testing the removal.
I just plugged in without re-assembly and some smoke escaped ... and we all know how important it is to keep the smoke locked up in the parts.

Once assembled properly, the  system worked - mostly. I&#039;m using it now.
The USBs on the back do not work. And the docking station does not work - it sees the monitor, but the monitor does not see it and again the USB does not work. on/off does work, but I&#039;m afraid it doesn&#039;t charge either. 
Oh well... so close, and yet so far.
Maybe the capacitor took out something else, or it was my sloppiness. Ouch.

Met vriendelijke groetjes,
Hein
Nashua, NH]]></description>
			<content:encoded><![CDATA[<p>Thanks for the great article and especially the link to the schematics.<br />
I was all but ready to toss our 7440 when prompted by your article and the (by comparison extremely amateuristic, and excessive long) youtube video : https://www.youtube.com/watch?v=9GXX5hdk-Oo&amp;t=1715s<br />
Aside - why do folks seem to insist making us sit through videos where a few well written paragraphs and a picture or two are so much more effective!</p>
<p>Anyway, in my case the capacitor you indicate with the green error seemed to me the only thing broken. The caps there are all in parallel, so it is hard to measure without removing. The reason I removed that one, and only that one had the slight suggestion of a crack in the plastics part - much like is visible in your picture with the orange error.  </p>
<p>These capacitor parts are exposed through the shield ... for anticipated  repairs, or to prevent shortcircuits of the thick components against the shield ??<br />
Since they are in parallel, and there are many, and two right next to it, and encouraged by the youtube above, I merely removed it without replacing.</p>
<p>Unfortunately I was too anxious and too sloppy testing the removal.<br />
I just plugged in without re-assembly and some smoke escaped ... and we all know how important it is to keep the smoke locked up in the parts.</p>
<p>Once assembled properly, the  system worked - mostly. I'm using it now.<br />
The USBs on the back do not work. And the docking station does not work - it sees the monitor, but the monitor does not see it and again the USB does not work. on/off does work, but I'm afraid it doesn't charge either.<br />
Oh well... so close, and yet so far.<br />
Maybe the capacitor took out something else, or it was my sloppiness. Ouch.</p>
<p>Met vriendelijke groetjes,<br />
Hein<br />
Nashua, NH</p>
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		<title>
		By: Maawa Aziizi		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371868</link>

		<dc:creator><![CDATA[Maawa Aziizi]]></dc:creator>
		<pubDate>Wed, 04 Nov 2020 05:46:17 +0000</pubDate>
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					<description><![CDATA[Thanks for the article.hope it was a typing error.on the data sheet you have shared both mosfets seem to be p channel not n channel.]]></description>
			<content:encoded><![CDATA[<p>Thanks for the article.hope it was a typing error.on the data sheet you have shared both mosfets seem to be p channel not n channel.</p>
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		<title>
		By: Chris		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371039</link>

		<dc:creator><![CDATA[Chris]]></dc:creator>
		<pubDate>Fri, 18 Sep 2020 05:56:40 +0000</pubDate>
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					<description><![CDATA[I am using a cheap USB microscope (camera) hooked up to PC and modified  to fit on my magnifier arm works very well they are available very cheaply on many e sites.
Great for Id of smd components and bad tracks normally comes with software for viewing but some really simple and better options on the web]]></description>
			<content:encoded><![CDATA[<p>I am using a cheap USB microscope (camera) hooked up to PC and modified  to fit on my magnifier arm works very well they are available very cheaply on many e sites.<br />
Great for Id of smd components and bad tracks normally comes with software for viewing but some really simple and better options on the web</p>
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		<title>
		By: Albert van Bemmelen		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371030</link>

		<dc:creator><![CDATA[Albert van Bemmelen]]></dc:creator>
		<pubDate>Thu, 17 Sep 2020 13:09:34 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371027&quot;&gt;dicksy&lt;/a&gt;.

I wish we could say that we nowadays added the most modern equipment that exists to our equipment, like say an electronic microscope or a scanning (electronic) microscope, but those sadly are still not available moneywise. Although the first electronic microscope was already invented and designed around 1933. We use (stereo) microscopes and other common microscopes, and the expensive thermic camera. Why is it that you ask Dicksy?]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371027">dicksy</a>.</p>
<p>I wish we could say that we nowadays added the most modern equipment that exists to our equipment, like say an electronic microscope or a scanning (electronic) microscope, but those sadly are still not available moneywise. Although the first electronic microscope was already invented and designed around 1933. We use (stereo) microscopes and other common microscopes, and the expensive thermic camera. Why is it that you ask Dicksy?</p>
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		<title>
		By: dicksy		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371027</link>

		<dc:creator><![CDATA[dicksy]]></dc:creator>
		<pubDate>Thu, 17 Sep 2020 10:14:50 +0000</pubDate>
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					<description><![CDATA[nice article and very help full.i need to ask a question,from all of you,are there any solutions to increase our eyesight]]></description>
			<content:encoded><![CDATA[<p>nice article and very help full.i need to ask a question,from all of you,are there any solutions to increase our eyesight</p>
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		<title>
		By: Albert van Bemmelen		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371023</link>

		<dc:creator><![CDATA[Albert van Bemmelen]]></dc:creator>
		<pubDate>Thu, 17 Sep 2020 05:07:23 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371020&quot;&gt;Yogesh Panchal&lt;/a&gt;.

You&#039;re completely right Yogesh! My shop ownwer friend therefore has several quite expensive cameras to be able to quick diagnostic any repair. At home I have an extensive set of hardware tools and testers too, and even spare hot air solder stations and at least 6 oscilloscopes (3 of which were repaired, one build as kit, and the other 2 were bought new), amongst many build projects and added testers. Probably even more than my shopowner friend does but he also has an ultrasonic cleaning tank, and a simple hotfix machine for the more difficult repairs that involve issues as moisture damaged boards. And luckily I do not have to fix anything professional to survive running an ICT shop but I do love my electronics hobby more than anything else!]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371020">Yogesh Panchal</a>.</p>
<p>You're completely right Yogesh! My shop ownwer friend therefore has several quite expensive cameras to be able to quick diagnostic any repair. At home I have an extensive set of hardware tools and testers too, and even spare hot air solder stations and at least 6 oscilloscopes (3 of which were repaired, one build as kit, and the other 2 were bought new), amongst many build projects and added testers. Probably even more than my shopowner friend does but he also has an ultrasonic cleaning tank, and a simple hotfix machine for the more difficult repairs that involve issues as moisture damaged boards. And luckily I do not have to fix anything professional to survive running an ICT shop but I do love my electronics hobby more than anything else!</p>
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		<title>
		By: Albert van Bemmelen		</title>
		<link>https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371022</link>

		<dc:creator><![CDATA[Albert van Bemmelen]]></dc:creator>
		<pubDate>Wed, 16 Sep 2020 17:10:02 +0000</pubDate>
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					<description><![CDATA[In reply to &lt;a href=&quot;https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371011&quot;&gt;Albert van Bemmelen&lt;/a&gt;.

About your question about the schematic and what mosfet and circuit to see Mark, look at page 47 of this E7440 complete service manual &lt;a href=&quot;https://drive.google.com/file/d/0B6IqcVTk0jpYZmFYaFpiWHpmdk0/view&quot; target=&quot;_blank&quot; rel=&quot;noopener noreferrer nofollow ugc&quot;&gt;here&lt;/a&gt;

And search for Mosfets PQ700,PQ4 and PQ704, PQ706.]]></description>
			<content:encoded><![CDATA[<p>In reply to <a href="https://jestineyong.com/dell-latitude-e7440-p40g-laptop-repair/comment-page-1/#comment-371011">Albert van Bemmelen</a>.</p>
<p>About your question about the schematic and what mosfet and circuit to see Mark, look at page 47 of this E7440 complete service manual <a href="https://drive.google.com/file/d/0B6IqcVTk0jpYZmFYaFpiWHpmdk0/view" target="_blank" rel="noopener noreferrer nofollow ugc">here</a></p>
<p>And search for Mosfets PQ700,PQ4 and PQ704, PQ706.</p>
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