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Just thinking the cmos wouldn't cause this problem. Since you havent made any changes to it have you? Can you try this? You need the windows 7 disk. Click the link >>> Startup Repair
Just thinking the cmos wouldn't cause this problem. Since you havent made any changes to it have you? Can you try this? You need the windows 7 disk. Click the link >>> Startup Repair
Before that sorry now you can try this Advanced Boot Options and select last known good configuration
If the BIOS won't respond to boot the Win7 DVD or System Repair Disk to run Startup Repair then Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS using a method that you can access. The disk is provided in the last paragraph below.
Then Startup Repair should automate all the needed fixes but if not run System restore from the System Recovery Options.
If this fails to recover from an apparent failed Sleep or Hibernate state then try the other steps for Troubleshooting Windows 7 Failure to Start.
I'd also test the hardware just to be sure since it's built in on Dell by running Dell Diagnostics Utility - How to Run the
At some point you may decide to skip to the steps for rescuiing your files to run Dell Windows 7 PC Restore or get the superior Clean Reinstall - Factory OEM Windows 7 using the disk provided in Step 1. You can delete all partitions during reinstall except the OEM Diagnostics if it will run from boot.
Did you even read Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS ?
Power down your PC, unplug and drain power by holding the power button, then as I already told you choose one of the steps to manually reset the CMOS in the tutorial. This may resolve the keyboard issue.
None of the steps I gave you depend upon booting into Win7 which is when any Resume error would appear. You just have to be quick enough with good timing to trigger F12 at the first BIOS screen before the OS is even called upon, to trigger Dell Diagnostics and then the Win7 DVD. If your keyboard won't be recognized by tapping f12 use another.
Once you do this reboot into the Win7 DVD which is provided in the Troubleshooting Windows 7 Failure to Start. tutorial to run Startup Repair a few times and then if necessary System Restore from the Recovery options.
Do you have any other standard keyboards that you could try with the computer ? Sometimes you can get them at thrift stores for $5.
Have you tried unplugging the keyboard and using another USB port?
Have you thought about taking the new keyboard back (it could be faulty)?