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Posted on Jan 02, 2017
SOURCE: Keyboard problems.
1. Restart the PC. 2. Hit F12 key repeatedly as soon as the PC turns ON. This will bring up the Boot Menu. 3. Select DELL Diagnostics. 4. Select the Complete / Full from the list of options. 5. Let the tests run which may take about an hour. Make sure you are there in front of the PC for the first 10-15 minutes, because it would need your inputs. 6. This will test the keyboard and USB ports too. 7. This will also verify for you whether the keyboard works when Windows hasn't started. 8. If all the tests pass and your keyboard is still working after sometime, you have issues with Windows: Start you computer in Safe Mode and check the USB drivers and the keyboard drivers. 9. Now, if you continue having issues even when you are running the diagnostics, you need to check your hardware viz. keyboard (try installing another keyboard if you have one) and the USB port. PLEASE REVERT BACK WITH THE RESULTS. I WOULD LOVE TO HELP YOU FURTHER ON THIS, IF THE ISSUE CONTINUES.
Posted on Mar 08, 2007
I have had the same problem with my dell xps 400. What I did was purchased a usb power hub and that solved the problem for me. SAved me from buying a new mother board.
Posted on Dec 10, 2008
Hi, Sorry you are having problems,
Well Marcelo, the first thing to do in a situation like this is to restart your Mac or even better, shut down and restart. So, if you have done this, and still the keyboard and mouse don't respond, and, as you have mentioned, you have tried the other USB ports on the back of the Mac, it sounds like somehow, unexpectedly, your iMac motherboard got a shock of some kind and it killed the USB controller....
Last thing to try is to unplug the iMac completely of everything and let it sit for 10 minutes and then plug just the keyboard and mouse back in and try to see if that does the trick..
Otherwise, Apple will cover this if it is still under warranty.
Posted on Apr 02, 2009
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