I have an HP 850 G3 laptop with fn key mode stuck

[davevanm]

I have an EliteBook 850 G3 with a keyboard issue.  It seems to act like the FN key mode is stuck in place and only various keys will type.  I have seen this issue before and it somehow fixed itself.  The system works fine with an external keyboard, but not the built in keyboard.  Anyone seen this?  Is there a keystroke fix or is it hardware related? i.e. bad connection or something?

Thanks

[Huffer · Accepted solution]

If it works OK with an external then the problem is the built-in keyboard. 

U.S. Keyboards:

Keyboard, no backlight for HP EliteBook 850 821194-001

Keyboard, backlit for HP EliteBook 850 821195-001

Assuming you have (or would like) a backlit keyboard here is one to buy:

https://www.amazon.com/821157-001-821195-001-836623-001-819899-001-831-00323-00A/dp/B088M64DFX/ref=s...

"How to" on pp. 50-53 here:

Service Manual 

Post back with any more questions and please accept as solution if this is the info you needed.