Keyboard Issues L key types gibberish- Please respond!!!

Hi,

 

I have posted before and am hoping someone will respons this time. I was hoping at least someone from Dell would since it appears that others on the forum are having the same problem.  

I have been having an ongoing problem with my Inspiron 8600. When using the laptop keyboard I have a sporatic problem with the l. Occasionally it works for typing and L, but often I get garbled text. Below is a test I ran using Notepad (the problem shows up when using any application):
hjlk;;llllkj;\l;\ll;\l;\kjllllllllllkj;\ll;\lllllkj;\lfsda-jkl;\fsda-fsda-jkl;\jkl;\jkl;\l;kj;\

I also tested the other keys that would be part of the keypad if using the FN key, and no problem with them. Again I did this test in Notepad. The one strange thing I did find is if I hold down the L key, it appears to work fine. It is when I tap the key as if I would when normally typing, and the problem arrises.

I ran a Diagnostics test and the keyboard checked out fine.

I flased the BIOS

Update chipset software

removed the keyboard and used compressed air to clear out any dust.

 

I am still having the same problem. Help!!! Do I need to replace the keyboard