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Apple Computing Products:
macOS - Desktop Hardware
Trouble with "cable not connected" error
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<blockquote data-quote="BSD Meister" data-source="post: 1419705" data-attributes="member: 257388"><p>AHT only tests the interface circuitry, not an end to end connection (unless things have changed). If the system is telling you that there's no cable connected then that's what it SEES the problem as being (that doesn't mean that's it though).</p><p></p><p>The solder connections to the I/O connector on the logic board can break or crack fairly easily if forced, however another culprit might be the connector where the ethernet cable plugs in itself. Sometimes when removing a cable and connector, the fingers inside the connector can catch and bend in such a manner that their fingers are no longer in the right places. Look at the ethernet connector on the iMac and see if they look like any of the metal fingers are bent, out of place, or pushed far enough down that they're not making contact. If they aren't, be very carefully trying to manipulate them back into place. For your model (iMac 9,1) the I/O ports sit on a plastic deck on top of the logic board. I don't know if it's repairable besides replacing the logic board (it's not a standard Apple procedure, but some things Apple offers as solutions are done to speed up repair, not keep costs down).</p><p></p><p>When you lost your connection earlier, it's also possible that the driver stages of the interface got blown if they were hit with a transient. I would think AHT would catch it but I've seen cases (on FireWire) where they didn't.</p><p></p><p>Good luck.</p></blockquote><p></p>
[QUOTE="BSD Meister, post: 1419705, member: 257388"] AHT only tests the interface circuitry, not an end to end connection (unless things have changed). If the system is telling you that there's no cable connected then that's what it SEES the problem as being (that doesn't mean that's it though). The solder connections to the I/O connector on the logic board can break or crack fairly easily if forced, however another culprit might be the connector where the ethernet cable plugs in itself. Sometimes when removing a cable and connector, the fingers inside the connector can catch and bend in such a manner that their fingers are no longer in the right places. Look at the ethernet connector on the iMac and see if they look like any of the metal fingers are bent, out of place, or pushed far enough down that they're not making contact. If they aren't, be very carefully trying to manipulate them back into place. For your model (iMac 9,1) the I/O ports sit on a plastic deck on top of the logic board. I don't know if it's repairable besides replacing the logic board (it's not a standard Apple procedure, but some things Apple offers as solutions are done to speed up repair, not keep costs down). When you lost your connection earlier, it's also possible that the driver stages of the interface got blown if they were hit with a transient. I would think AHT would catch it but I've seen cases (on FireWire) where they didn't. Good luck. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
Trouble with "cable not connected" error
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