Missed Key Press

I first noticed missed key press after installing and later removing Bootcamp.
After several months of missing key presses, I uninstalled Internet Explore.
The missed key presses were gone (unnoticed) for more than a week and then they started intermittently.
After the Bootcamp removal and before the Internet Explore removal, I would notice the cursor flash about 10 times and stop. Then the next key press would miss.
After Internet Explore removal, I have not seen the cursor stop, but I still get missed key presses. I tested it just now, counted 100 cursor flashes and the next key press missed. Repeated 100 count again and key press okay.
Summary:
Missed Key Press:
iMac 17", OS 10.5.8
After Bootcamp uninstall, missed key press after 7-10 cursor flashes always.
After IE removal, missed key presses seemingly random.
I seen old posts (2006 - 2009) about missed key press which were archived without answers.
Any help would be appreciated.

Capslock blinking twice and then repeating is a diagnostic error message that means that the BIOS is corrupt.
Try a hard reset as follows:
1) Remove the battery and unplug the DC power adapter.
2) Press and hold the power button for more than fifteen seconds.
3) Plug in the DC power adapter (leave the battery out for now)
4) Press the power button
Please post your positive or negative results here in your thread.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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