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Apple Computing Products:
macOS - Desktop Hardware
iMac late 2011 Screen Issue
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<blockquote data-quote="sjsteve33171" data-source="post: 1854447" data-attributes="member: 404782"><p>Hi All,</p><p></p><p>I'm a PC tech by day and recently a friend gave me his old iMac and said the screen keeps going off. If you can fix it you can keep it and he brought a new one. So I started looking at it. It's had several faults, all which I've slowly fixed and still no further in resolving the issue, so I'm now seeking any assistance please!</p><p></p><p>Firstly the CPU fan was dead according to the hardware diagnostics. I've replaced this now.</p><p>Graphics card has been reflowed and had new thermal paste applied.</p><p>Screen cable was slightly damaged so have replaced this.</p><p>Could see a capacitor had blown on the Inverter board. Have replaced this today.</p><p>SMC and NVRAM reset.</p><p></p><p>Still when I turn the mac on, its on for a few seconds before it goes black and there are no backlights. However, if I shine a torch on the screen, the screen does work as I can read what's on it. I also have a remote access tool on it and can access the mac remotely and it works still, but the screen has no backlights. Really I'm now stuck as to what the issue is. Hardware tests are passing, screen is working, just no backlights. Inverter board has been replaced with a working one, still goes off.</p><p></p><p>Has anyone else had this issue and can help or anyone may be able to tell me of any other tests I can do please? It's the only iMac in the house so I can't swap parts to test things either.</p><p></p><p>Thanks in advance!</p></blockquote><p></p>
[QUOTE="sjsteve33171, post: 1854447, member: 404782"] Hi All, I'm a PC tech by day and recently a friend gave me his old iMac and said the screen keeps going off. If you can fix it you can keep it and he brought a new one. So I started looking at it. It's had several faults, all which I've slowly fixed and still no further in resolving the issue, so I'm now seeking any assistance please! Firstly the CPU fan was dead according to the hardware diagnostics. I've replaced this now. Graphics card has been reflowed and had new thermal paste applied. Screen cable was slightly damaged so have replaced this. Could see a capacitor had blown on the Inverter board. Have replaced this today. SMC and NVRAM reset. Still when I turn the mac on, its on for a few seconds before it goes black and there are no backlights. However, if I shine a torch on the screen, the screen does work as I can read what's on it. I also have a remote access tool on it and can access the mac remotely and it works still, but the screen has no backlights. Really I'm now stuck as to what the issue is. Hardware tests are passing, screen is working, just no backlights. Inverter board has been replaced with a working one, still goes off. Has anyone else had this issue and can help or anyone may be able to tell me of any other tests I can do please? It's the only iMac in the house so I can't swap parts to test things either. Thanks in advance! [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac late 2011 Screen Issue
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