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Apple Computing Products:
macOS - Desktop Hardware
2011 IMAC 21.5 - No Power and Diagnostic LED #4 Briefly Lights Up
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<blockquote data-quote="apsinger" data-source="post: 1604064" data-attributes="member: 332868"><p>Hello Mac Forums!</p><p></p><p>Hoping I can beg for some advice.....</p><p></p><p>I just couldnt afford a new IMAC, so I perhaps stupidly bought a 2011 IMAC 21.5", Core I5 that would not power up. It came with no ram and no HD.</p><p></p><p>I found the IMAC Apple Service Guide for the Mid-2011. I'm having trouble with the trouble shooting flow. I cant really afford to just buy a new Logic Board and Power Supply in the hopes that fixes the issue. I can try the Power Supply if needed as I think I can find one for around a hundred, but the Logic Board....ugh.....300-500 it seems.....</p><p></p><p>I now have Ram and a new Solid State HD to install......but need to figure out this problem before any of that can be installed.</p><p></p><p>When the Power Button is depressed, no response.</p><p>I watched Utube and removed the LCD....very carefully!</p><p>I exposed the Diagnostic LED's.</p><p>When AC power is plugged into the IMAC, LED #4 would illuminate and then would go out if you pushed the Start Button. If you pushed the Start Button again, no response and the LED remains out/dark.</p><p></p><p>I removed the coin battery to check it and it was fine. When I put it back, now the LED #4 will only briefly illuminate and then go dark. The power button still has no effect. </p><p></p><p>The Technician Guide is confusing as this LED #4 is supposed to be for communication between the Logic Board and the LCD.</p><p></p><p>I really cant afford to just start buying parts......if its just the Power Supply.....that's not so bad.....about 100. If I have to try the Logic Board....ugh....thats approaching 4 or 500!!!</p><p></p><p>I'm hoping someone may have some experience with this issue. I've searched and searched, but cant find a post for this scenario. I found a comment on a Sales site for MAC stuff that seemed to point to the Logic Board, but it was just a comment......</p><p></p><p>This is for my wife....she always wanted a MAC.....and I've always been a windows guy.....but I'm willing to learn! If anyone has any thoughts or advice on how I can test these parts or if I need to take some other path.....</p><p></p><p>I really really appreciate any advice.</p></blockquote><p></p>
[QUOTE="apsinger, post: 1604064, member: 332868"] Hello Mac Forums! Hoping I can beg for some advice..... I just couldnt afford a new IMAC, so I perhaps stupidly bought a 2011 IMAC 21.5", Core I5 that would not power up. It came with no ram and no HD. I found the IMAC Apple Service Guide for the Mid-2011. I'm having trouble with the trouble shooting flow. I cant really afford to just buy a new Logic Board and Power Supply in the hopes that fixes the issue. I can try the Power Supply if needed as I think I can find one for around a hundred, but the Logic Board....ugh.....300-500 it seems..... I now have Ram and a new Solid State HD to install......but need to figure out this problem before any of that can be installed. When the Power Button is depressed, no response. I watched Utube and removed the LCD....very carefully! I exposed the Diagnostic LED's. When AC power is plugged into the IMAC, LED #4 would illuminate and then would go out if you pushed the Start Button. If you pushed the Start Button again, no response and the LED remains out/dark. I removed the coin battery to check it and it was fine. When I put it back, now the LED #4 will only briefly illuminate and then go dark. The power button still has no effect. The Technician Guide is confusing as this LED #4 is supposed to be for communication between the Logic Board and the LCD. I really cant afford to just start buying parts......if its just the Power Supply.....that's not so bad.....about 100. If I have to try the Logic Board....ugh....thats approaching 4 or 500!!! I'm hoping someone may have some experience with this issue. I've searched and searched, but cant find a post for this scenario. I found a comment on a Sales site for MAC stuff that seemed to point to the Logic Board, but it was just a comment...... This is for my wife....she always wanted a MAC.....and I've always been a windows guy.....but I'm willing to learn! If anyone has any thoughts or advice on how I can test these parts or if I need to take some other path..... I really really appreciate any advice. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
2011 IMAC 21.5 - No Power and Diagnostic LED #4 Briefly Lights Up
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