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Apple Computing Products:
macOS - Desktop Hardware
One row of keys on the iMac keyboard has suddenly gone dead.
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<blockquote data-quote="davebull" data-source="post: 1528156" data-attributes="member: 307561"><p>The keys that no longer work are on the lower row, from Z through the / (plus the left-most Command key and the space bar on the bottom row). System is iMac (spring 2009), running 10.5.8, with a wired keyboard (the one with a number pad).</p><p></p><p>Solutions tried:</p><ul> <li data-xf-list-type="ul"> change to another keyboard - this second keyboard showed exactly the same symptoms.</li> <li data-xf-list-type="ul"> switch keyboard(s) to another USB port</li> <li data-xf-list-type="ul"> reset SMC (twice)</li> <li data-xf-list-type="ul"> reset PRAM (twice)</li> <li data-xf-list-type="ul"> switch to another User Account</li> <li data-xf-list-type="ul"> boot from Install disc</li> <li data-xf-list-type="ul"> clean contacts on USB cables (and sockets)</li> </ul><p></p><p>None of these things worked. The same keys are dead, now on both keyboards.</p><p></p><p>But what is really bizarre is that when I took the two keyboards and tried them on a second computer (my MacBook running 10.7.2). It then showed the same symptoms - same keys dead.</p><p></p><p>So to rundown:</p><ul> <li data-xf-list-type="ul"> keyboard A initially stopped working on machine A</li> <li data-xf-list-type="ul"> keyboard B was plugged into machine A as a test, but also didn't work (in exactly the same way)</li> <li data-xf-list-type="ul"> machine A was restarted, PRAMMed, etc. as described above, but neither keyboard A or B will work on it, even when the machine is booted from an install disc<br /> </li> <li data-xf-list-type="ul"> machine B (the laptop) works normally, with its own keyboard</li> <li data-xf-list-type="ul"> plug in keyboard A - no go. Same symptoms - same keys don't work, everything else fine.</li> <li data-xf-list-type="ul"> plug in keyboard B - no go. Same symptoms - same keys don't work. The first keyboard has Zombified the second one, or killed machine B in exactly the same way!</li> <li data-xf-list-type="ul"> unplug keyboards, restart machine B - it returns to normal.</li> </ul><p></p><p>What is going on? Any suggestions would be much appreciated ...</p></blockquote><p></p>
[QUOTE="davebull, post: 1528156, member: 307561"] The keys that no longer work are on the lower row, from Z through the / (plus the left-most Command key and the space bar on the bottom row). System is iMac (spring 2009), running 10.5.8, with a wired keyboard (the one with a number pad). Solutions tried: [LIST] [*] change to another keyboard - this second keyboard showed exactly the same symptoms. [*] switch keyboard(s) to another USB port [*] reset SMC (twice) [*] reset PRAM (twice) [*] switch to another User Account [*] boot from Install disc [*] clean contacts on USB cables (and sockets) [/LIST] None of these things worked. The same keys are dead, now on both keyboards. But what is really bizarre is that when I took the two keyboards and tried them on a second computer (my MacBook running 10.7.2). It then showed the same symptoms - same keys dead. So to rundown: [LIST] [*] keyboard A initially stopped working on machine A [*] keyboard B was plugged into machine A as a test, but also didn't work (in exactly the same way) [*] machine A was restarted, PRAMMed, etc. as described above, but neither keyboard A or B will work on it, even when the machine is booted from an install disc [*] machine B (the laptop) works normally, with its own keyboard [*] plug in keyboard A - no go. Same symptoms - same keys don't work, everything else fine. [*] plug in keyboard B - no go. Same symptoms - same keys don't work. The first keyboard has Zombified the second one, or killed machine B in exactly the same way! [*] unplug keyboards, restart machine B - it returns to normal. [/LIST] What is going on? Any suggestions would be much appreciated ... [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
One row of keys on the iMac keyboard has suddenly gone dead.
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