<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>glhaynes</author><text>I&amp;#x27;ve never worked inside a CRT (but may need to soon) and am &lt;i&gt;not&lt;/i&gt; great at electronics repair, but I&amp;#x27;m a little surprised you describe yourself as having a lot of skill but still tend to avoid them. From my understanding, it&amp;#x27;s straightforward to reliably discharge them and make them safe to work on. Do you think it&amp;#x27;s easier to get this wrong than I&amp;#x27;ve understood or do you just feel uneasy about it in general? Just curious!</text><parent_chain><item><author>wkat4242</author><text>Nice job and write-up.&lt;p&gt;As the author says CRTs are dangerous. Even when they&amp;#x27;re off they can still carry insanely high voltages. The flyback transformer is one of the more dangerous components of them.&lt;p&gt;I&amp;#x27;m great at electronics repair and I tend to avoid them. Luckily these days that&amp;#x27;s easy :)&lt;p&gt;If you don&amp;#x27;t know what you&amp;#x27;re doing, you shouldn&amp;#x27;t attempt it. Just get a more technical friend to do it.&lt;p&gt;If you do know what you&amp;#x27;re doing you probably wouldn&amp;#x27;t need this guide in the first place :)</text></item></parent_chain></comment><story><title>Replacing the bad flyback transformer in Apple&apos;s Studio Display 17&quot;</title><url>https://www.riveducha.com/fix-apple-studio-display-flyback</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>the_third_wave</author><text>Ah, electronics hobbyists these days... I repaired my first TV at 16yo, it was a Nordmende B&amp;amp;W set with a resistor directly on the output of the flyback transformer. That resistor was broken which led to a nice corona discharge lighting up the inside of the set, looking at it was like looking at the set of a 30&amp;#x27;s Frankenstein movie. This set me up for a &amp;#x27;career&amp;#x27; of repairing televisions and (later) monitors while at university where I came across all sorts of interesting light&amp;#x2F;sound&amp;#x2F;smoke effects from those 35kV flyback transformers with cascade circuits (called &amp;#x27;tripplers&amp;#x27; since they were used to raise the output voltage) on large-tube sets.&lt;p&gt;I never got zapped which is a good thing since yes, that can be unpleasant and - depending on when and where it happens - dangerous. Discharge those tubes and cascades before you fiddle with them, use a screwdriver connected to a ground wire which is connected to the metal tube frame. If you want to do it &amp;#x27;professionally&amp;#x27; you&amp;#x27;ll want to put a HT resistor in that wire, otherwise just zap the thing by sticking the screwdriver under the plastic cap on the high tension connector at the tube.</text><parent_chain><item><author>wkat4242</author><text>Nice job and write-up.&lt;p&gt;As the author says CRTs are dangerous. Even when they&amp;#x27;re off they can still carry insanely high voltages. The flyback transformer is one of the more dangerous components of them.&lt;p&gt;I&amp;#x27;m great at electronics repair and I tend to avoid them. Luckily these days that&amp;#x27;s easy :)&lt;p&gt;If you don&amp;#x27;t know what you&amp;#x27;re doing, you shouldn&amp;#x27;t attempt it. Just get a more technical friend to do it.&lt;p&gt;If you do know what you&amp;#x27;re doing you probably wouldn&amp;#x27;t need this guide in the first place :)</text></item></parent_chain></comment><story><title>Replacing the bad flyback transformer in Apple&apos;s Studio Display 17&quot;</title><url>https://www.riveducha.com/fix-apple-studio-display-flyback</url></story>