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		<title>Computingzone.net now on Linode</title>
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		<comments>http://computingzone.net/2010/06/computingzone-net-now-on-cherokee-server/#comments</comments>
		<pubDate>Mon, 14 Jun 2010 01:59:41 +0000</pubDate>
		<dc:creator>Caleb</dc:creator>
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		<category><![CDATA[cherokee server]]></category>
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		<guid isPermaLink="false">http://computingzone.net/?p=169</guid>
		<description><![CDATA[Computingzone.net is now hosted by Linode* VPS and running. *Fair disclosure, this is a referral link. Keep an account for 90 days and I get $20.]]></description>
			<content:encoded><![CDATA[<p>Computingzone.net is now hosted by <a href="http://www.linode.com/?r=8cc86ef83a6cfffc7499f5a8937b482e26f37d29">Linode</a>* VPS and running.</p>
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		<item>
		<title>Dead LCD – Final Report</title>
		<link>http://feedproxy.google.com/~r/Computingzone/~3/wQHuHSxbvXI/</link>
		<comments>http://computingzone.net/2009/12/dead-lcd-final-report/#comments</comments>
		<pubDate>Sun, 06 Dec 2009 04:43:05 +0000</pubDate>
		<dc:creator>Caleb</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://computingzone.net/?p=163</guid>
		<description><![CDATA[Due to lack of time, and a plain lack of understanding for why the LCD Screens wont work after replacing all their capacitors I have chosen to junk the both of them. In their place I acquired&#160;a 23&#34; wide screen&#160;1080p &#8230; <a href="http://computingzone.net/2009/12/dead-lcd-final-report/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
			<content:encoded><![CDATA[<p>Due to lack of time, and a plain lack of understanding for why the LCD Screens wont work after replacing all their capacitors I have chosen to junk the both of them. In their place I acquired&nbsp;a 23&quot; wide screen&nbsp;1080p Acer LCD on Black Friday.</p>

<p><a href="http://feedads.g.doubleclick.net/~a/9tVW75D3psYsfOx9fC3sA5D4RxE/0/da"><img src="http://feedads.g.doubleclick.net/~a/9tVW75D3psYsfOx9fC3sA5D4RxE/0/di" border="0" ismap="true"></img></a><br/>
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		<item>
		<title>Dead LCD Part 2</title>
		<link>http://feedproxy.google.com/~r/Computingzone/~3/mLJ0sq2xgFs/</link>
		<comments>http://computingzone.net/2009/09/dead-lcd-part-2/#comments</comments>
		<pubDate>Thu, 17 Sep 2009 20:04:28 +0000</pubDate>
		<dc:creator>Caleb</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[ccfl]]></category>
		<category><![CDATA[dead lcd]]></category>
		<category><![CDATA[lcd repair]]></category>
		<category><![CDATA[samsung 930b]]></category>

		<guid isPermaLink="false">http://computingzone.net/?p=120</guid>
		<description><![CDATA[Its been a while since I posted so a little update. I&#39;ve replaced the capacitors in both power supplies and yet neither monitor will function. On one supply I replaced all the capacitors, and on the second I only replaced &#8230; <a href="http://computingzone.net/2009/09/dead-lcd-part-2/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
			<content:encoded><![CDATA[<p>Its been a while since I posted so a little update. I&#39;ve replaced the capacitors in both power supplies and yet neither monitor will function. On one supply I replaced all the capacitors, and on the second I only replaced the three that showed visual signs of damage. With both the results were the same. No light output from the LCD, yet the &quot;No signal detected&quot; error was clearly visible with a flashlight. In addition, both power supplies now generate a fairly audible hum. I&#39;ve got a few more tricks to try, but both LCDs (and the $50 I have invested so far) are not far from the dumpster.</p>
<p><a href="http://gallery.computingzone.net/index.php/computer/lcd_repair/recap_partial"><img align="left" alt="Replaced just the three visibly damaged capacitors." height="150" src="http://gallery.computingzone.net/var/resizes/computer/lcd_repair/recap_partial.jpg?m=1276133878" title="Replaced just the three visibly damaged capacitors." width="200" /></a>&nbsp;<a href="http://gallery.computingzone.net/index.php/computer/lcd_repair/recap-complete"><img align="right" alt="Replaced all capacitors except the largest one." height="150" src="http://gallery.computingzone.net/var/resizes/computer/lcd_repair/recap-complete.jpg?m=1276133879" title="Replaced all capacitors except the largest one." width="200" /></a></p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p><a href="http://gallery.computingzone.net/index.php/computer/lcd_repair/IMG_0246"><img align="left" alt="This shows that the CCFL is working correctly." height="150" src="http://gallery.computingzone.net/var/resizes/computer/lcd_repair/IMG_0246.JPG?m=1276133890" title="This shows that the CCFL is working correctly." width="200" /></a>&nbsp;<a href="http://gallery.computingzone.net/index.php/computer/lcd_repair/IMG_0244"><img align="right" alt="Neither of these CCFLs can fully fire due to how they were connected, but they are working just fine." height="150" src="http://gallery.computingzone.net/var/resizes/computer/lcd_repair/IMG_0244.JPG?m=1276133888" title="Neither of these CCFLs can fully fire due to how they were connected, but they are working just fine." width="200" /></a></p>

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		<item>
		<title>Samsung 930B Disassembly Guide</title>
		<link>http://feedproxy.google.com/~r/Computingzone/~3/MJEpgXkjyLI/</link>
		<comments>http://computingzone.net/2009/09/samsung-930b-disassembly-guide/#comments</comments>
		<pubDate>Tue, 01 Sep 2009 16:09:41 +0000</pubDate>
		<dc:creator>Caleb</dc:creator>
				<category><![CDATA[Guides]]></category>
		<category><![CDATA[lcd disassembly]]></category>
		<category><![CDATA[lcd repair]]></category>
		<category><![CDATA[samsung 930b disassembly]]></category>

		<guid isPermaLink="false">http://computingzone.net/?p=64</guid>
		<description><![CDATA[To go along with my previous post here is a partial disassembly guide for the Samsung 930B. The only tools you will need are a Phillips and  flat blade screwdriver as well as a set of needle-nose pliers (not pictured). &#8230; <a href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
			<content:encoded><![CDATA[<p>To go along with my previous post here is a partial disassembly guide for the Samsung 930B.</p>
<p>The only tools you will need are a Phillips and  flat blade screwdriver as well as a set of needle-nose pliers (not pictured).</p>
<div id="attachment_65" class="wp-caption aligncenter" style="width: 285px"><a rel="attachment wp-att-65" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step1/"><img class="size-medium wp-image-65" title="Step 1" src="http://computingzone.net/wp-content/uploads/2009/09/Step1-275x300.jpg" alt="Step 1" width="275" height="300" /></a><p class="wp-caption-text">This is all you will need</p></div>
<p><span id="more-64"></span></p>
<p>Lay the monitor down on its front so that you can see the backside clearly. The first step is to remove the stand. There are 5 visible screws, remove the three in the center and the stand will slide away.</p>
<div id="attachment_66" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-66" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step2/"><img class="size-medium wp-image-66 " title="Step 2" src="http://computingzone.net/wp-content/uploads/2009/09/Step2-300x225.jpg" alt="Remove these screws and the stand will slide off." width="300" height="225" /></a><p class="wp-caption-text">Remove these screws and the stand will slide off.</p></div>
<p>Set it aside and continue.</p>
<p><a rel="attachment wp-att-69" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/stand-removed/"><img class="aligncenter size-medium wp-image-69" title="Stand Removed" src="http://computingzone.net/wp-content/uploads/2009/09/stand-removed-300x225.jpg" alt="Stand Removed" width="300" height="225" /></a></p>
<p>Remove the three final screws (one was hidden under part of the stand).</p>
<p><a rel="attachment wp-att-74" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step3/"><img class="aligncenter size-medium wp-image-74" title="Step 3" src="http://computingzone.net/wp-content/uploads/2009/09/Step3-300x225.jpg" alt="Step 3" width="300" height="225" /></a></p>
<p>Stand the monitor on its top so that you are looking at the buttons on the bottom and that the screen itself is facing away from you. Gently pry the two halves apart with your fingers so they look like the image below.</p>
<p><a rel="attachment wp-att-77" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step4/"><img class="aligncenter size-medium wp-image-77" title="Step 4" src="http://computingzone.net/wp-content/uploads/2009/09/step4-300x225.jpg" alt="Step 4" width="300" height="225" /></a></p>
<p>Take your flat blade screw driver and insert it into the gap and gently work it over to one of the edges. Dont try and force the two halves apart or it will break. The tabs that hold them together are on the side, so you just need to keep the halves far enough apart so that you can work the screw driver around the edge and down the side.</p>
<div id="attachment_78" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-78" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step5/"><img class="size-medium wp-image-78" title="Step 5" src="http://computingzone.net/wp-content/uploads/2009/09/step5-300x225.jpg" alt="Forgive the blurryness of this image, the camera wouldnt focus right." width="300" height="225" /></a><p class="wp-caption-text">Forgive the blurriness of this image, the camera wouldnt focus right.</p></div>
<p>The top half  (the side that should be facing away from you) rests over and around the bottom half. The trick is to get the flat blade screw driver in between the two halves and gently pull them off of each other. I found this easiest with the screen leaning against me and by prying the screw driver slightly to the side (away from the screen). Dont try to force the halves apart directly, you&#8217;ll only break the plastic bezel. If one side seems to stick, try going down the other side. Once you have one side removed, the other should come loose even easier. The bottom (It&#8217;s actually the top of the screen, but if your following this guide it will be facing down) will remain attached.</p>
<div id="attachment_79" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-79" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step6/"><img class="size-medium wp-image-79" title="Step 6" src="http://computingzone.net/wp-content/uploads/2009/09/Step6-300x225.jpg" alt="The two sides should separate easily." width="300" height="225" /></a><p class="wp-caption-text">The two sides should separate easily.</p></div>
<p>Looking down from the top with the two halves of the bezel pried apart 4-6 inches you should see a cable running from the button circuit board back under the screen itself. It can be safely unplugged but just pulling on it, there is no latch or retention mechanism.</p>
<div id="attachment_80" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-80" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step7/"><img class="size-medium wp-image-80" title="Step 7" src="http://computingzone.net/wp-content/uploads/2009/09/step7-300x112.jpg" alt="Disconnect the cable running to the botton/controlpanel." width="300" height="112" /></a><p class="wp-caption-text">Disconnect the cable running to the bottom/control panel.</p></div>
<p>The screen itself is not attached to either of the bezel halves, simply sandwiched between them. At this point you can remove the top half of the bezel by opening it further and wiggling it a little, or just slide the screen itself out leaving the bezel still attached. I elected to remove the bezel completely. Whichever method you choose, lay the screen glass-side down in a safe location. I chose a folded towel on the table.</p>
<p><a rel="attachment wp-att-83" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step8/"><img class="aligncenter size-medium wp-image-83" title="Step 8" src="http://computingzone.net/wp-content/uploads/2009/09/step8-300x225.jpg" alt="Step 8" width="300" height="225" /></a></p>
<p>You may notice that the large slab of metal on the back is not actually attached to the screen itself in any way, if you aren&#8217;t careful it will come loose. You&#8217;ll need to remove the CCFL and LCD cables first before you can safely remove it. On the right side you&#8217;ll note the large EM shield. This is covering the high-voltage CCFL cables. These cables plug into a circuit board just under this shield however, they are held in place by retention clips, so the shield will need to be removed first.</p>
<div id="attachment_86" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-86" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/ccfl-shield/"><img class="size-medium wp-image-86" title="CCFL shield" src="http://computingzone.net/wp-content/uploads/2009/09/ccfl-shield-300x225.jpg" alt="This metal shield absorbs some of the EMI generated by the highvoltage CCFLs." width="300" height="225" /></a><p class="wp-caption-text">This metal shield absorbs some of the EMI generated by the high-voltage CCFLs.</p></div>
<p>I found the easiest way to remove it was to grab it on the top (right side of the image above) and pull it towards the camera, this would release the bottom right tab. It should then be able to wiggle far enough to loosen the top two tabs. I&#8217;ve taken two of these screens apart and neither one of the shields came out the same way. Both were a PITA, so your mileage may vary. It isn&#8217;t mission critical so it&#8217;s not the end of the world if you damage it slightly trying to remove it, just so long as it can be reused.</p>
<div id="attachment_89" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-89" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/shield-removed/"><img class="size-medium wp-image-89" title="Shield removed" src="http://computingzone.net/wp-content/uploads/2009/09/shield-removed-300x117.jpg" alt="Here you can see the CCFL cables and their black retention clips." width="300" height="117" /></a><p class="wp-caption-text">Here you can see the CCFL cables and their black retention clips.</p></div>
<p>With the shield removed you&#8217;ll expose the CCFL power cables and their connectors. The connectors are held in place by a simple retention clip. Simply press down on the center of the clip and simultaneously pull up on the outside of the clip and it should lift right off.</p>
<p><a rel="attachment wp-att-90" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/clip-removed/"><img class="aligncenter size-medium wp-image-90" title="Clip removed" src="http://computingzone.net/wp-content/uploads/2009/09/clip-removed-300x145.jpg" alt="Clip removed" width="300" height="145" /></a>With the clips removed go ahead and disconnect the power cables for the CCFLs and let them hang loose. Gently lift the back panel up by pivoting it at the bottom and look underneath it. The red and white cable is the LCD DATA cable and is all that is holding the panel in place. There should be sufficient slack to lift the back panel up and reach under and disconnect the cable from the LCD. The connector is held in place by two small metal clasps on either side. Squeeze these together than the cable should disconnect easily. It might be a three handed job, to do it by lifting the back panel up. One of the two screens I disassembled had enough slack in the cable to lift the back panel up and slide it far enough forward to expose the cable from the bottom where it was easier to work on.</p>
<div id="attachment_97" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-97" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/lcd-cable/"><img class="size-medium wp-image-97" title="LCD Cable" src="http://computingzone.net/wp-content/uploads/2009/09/lcd-cable-300x225.jpg" alt="LCD Cable" width="300" height="225" /></a><p class="wp-caption-text">Disconnect this cable by squeezing together the clips on both sides.</p></div>
<p style="text-align: center;">
<p>With the cable detached lift the metal panel up and off the rest of the screen. It should now only be held in place with some pieces of tape.</p>
<p><a rel="attachment wp-att-98" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/lcd-cable2/"><img class="aligncenter size-medium wp-image-98" title="LCD Cable Detached" src="http://computingzone.net/wp-content/uploads/2009/09/lcd-cable2-300x225.jpg" alt="LCD Cable Detached" width="300" height="225" /></a></p>
<p>Flip the removed panel over and you will find two separate circuit boards. The board on the right is the DSP (Digital Signal Processor) while the board on the left is the integrated power supply and CCFL inverter.</p>
<div id="attachment_99" class="wp-caption aligncenter" style="width: 310px"><a rel="attachment wp-att-99" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/boards/"><img class="size-medium wp-image-99" title="Boards" src="http://computingzone.net/wp-content/uploads/2009/09/boards-300x225.jpg" alt="Left is the PSU, right is the DSP." width="300" height="225" /></a><p class="wp-caption-text">Left is the PSU, right is the DSP.</p></div>
<p>Remove the three screws holding the PSU board in place and remove it by lifting it up at an angle starting on the right side.</p>
<p><a rel="attachment wp-att-100" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step9/"><img class="aligncenter size-medium wp-image-100" title="Step 9" src="http://computingzone.net/wp-content/uploads/2009/09/step9-300x225.jpg" alt="Step 9" width="300" height="225" /></a>Once the board is angled about 10-15 degrees the power connector on the top should be clear of the metal panel. Once it is, pull it out to the side and lay it on top of the other board.</p>
<p><a rel="attachment wp-att-101" href="http://computingzone.net/2009/09/samsung-930b-disassembly-guide/step10/"><img class="aligncenter size-medium wp-image-101" title="Step 10" src="http://computingzone.net/wp-content/uploads/2009/09/step10-300x225.jpg" alt="Step 10" width="300" height="225" /></a>Squeeze the retention clip on top of the ribbon cable to disconnect it. Remove the PSU board to some place you can examine it and take a good look at the capacitors. If they look like those below, then the board is the cause of the problems.</p>
<div id="attachment_16" class="wp-caption aligncenter" style="width: 310px"><a href="http://computingzone.net/wp-content/uploads/2009/08/bad-caps.jpg"><img class="size-medium wp-image-16" title="Bad Capacitors" src="http://computingzone.net/wp-content/uploads/2009/08/bad-caps-300x208.jpg" alt="Potentially failed capacitors." width="300" height="208" /></a><p class="wp-caption-text">Potentially failed capacitors.</p></div>
<p>That ends this portion of the disassembly guide. The capacitors had failed on my PSU board and as such there was no need to disassemble the panel any further.</p>

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		<item>
		<title>Dead LCD</title>
		<link>http://feedproxy.google.com/~r/Computingzone/~3/7lanyPgVzBQ/</link>
		<comments>http://computingzone.net/2009/08/dead-samsung-930b/#comments</comments>
		<pubDate>Wed, 26 Aug 2009 02:15:19 +0000</pubDate>
		<dc:creator>Caleb</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[bulged capacitors]]></category>
		<category><![CDATA[ccfl]]></category>
		<category><![CDATA[dead lcd]]></category>
		<category><![CDATA[samsung 930b]]></category>

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		<description><![CDATA[A few weeks ago my secondary display (a Samsung 930B) went dark. No smoke, no fire, or any other spectacle, just work up one morning and it was dead. A simple flashlight test determined that the LCD itself was still &#8230; <a href="http://computingzone.net/2009/08/dead-samsung-930b/">Continue reading <span class="meta-nav">&#8594;</span></a>]]></description>
			<content:encoded><![CDATA[<p style="text-align: left;"><span>A few weeks ago my secondary display (a Samsung <span class="hiddenSpellError">930B</span>) went dark. No smoke, no fire, or any other spectacle, just work up one morning and it was dead. A simple flashlight test determined that the LCD itself was still OK since I could still see content on the screen, albeit barely. Life was a little chaotic so I simply set it aside and resigned myself to using only one screen in the interim.</span></p>
<p style="text-align: left;"><span>This evening I finally got a chance to pull it apart and take a peek inside to see if there was anything I could do for it. Initially I suspected that the CCFL(Cold cathode fluorescent lamp) had gone bad. I made this assumption based on experience with LCDs in laptops at a previous job, having never seen a LCD use more than one CCFL tube for lighting the entire display. This first assumption did not change with my cursory inspection of the joint inverter and power supply PCB(Printed Circuit Board). There were no immediate signs of failure such as scorch marks or visibly damaged components, and no telltale smell of burned electronics. I set the PCB aside and continued to dismantle the LCD panel itself. Upon removing the LCD panel from the light spreader and extracting the CCFL mounts, It surprised me to find not one, not two, but </span><em>four</em><span> CCFL tubes. The <span class="hiddenSpellError">CCFLs</span> <span class="hiddenGrammarError">were grouped</span> into two pairs, one mounted on the top and the other on the bottom of the panel.</span></p>
<div id="attachment_16" class="wp-caption alignleft" style="width: 160px"><a rel="attachment wp-att-16" href="http://computingzone.net/2009/08/dead-samsung-930b/bad-caps/"><img class="size-thumbnail wp-image-16" title="Bad Capacitors" src="http://computingzone.net/wp-content/uploads/2009/08/bad-caps-150x150.jpg" alt="Potentially failed capacitors." width="150" height="150" /></a><p class="wp-caption-text">Potentially failed capacitors.</p></div>
<p>The likelihood of all four tubes failing at once is astronomical, so I reexamined the power supply and inverter circuit board. Rather quickly I noticed 3 capacitors in the corner with bulged tops. Further searching on the internet led me to a forum post on <a href="http://www.badcaps.net/" target="_blank">Badcaps.net</a>. There another user had met nearly the same problem as myself, with the same model display. That user&#8217;s fix was to replace all the capacitors on the circuit board with new higher quality (and higher capacitance) ones from <a href="http://www.digikey.com/" target="_blank">Digikey</a>.</p>
<p style="text-align: left;"><span>In the mean time I have also learned that the <span class="hiddenSpellError">CCFLs</span> and inverters used in common PC lighting kits are nearly identical in design to those used in LCDs. To test the LCD inverter or CCFL, you simply connect them to their counterpart from the common lighting kit. This provides a cheap and simple method to <span class="hiddenSuggestion">determine</span> if the failure is either the LCD inverter, or the CCFL. As I was never much into the PC modding scene, I do not have one of these kits and will need to acquire one before continuing.</span></p>

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