Two places we see noted in this forum to fix such things.
ikenfixit.com and notefix.com
See what they say it will cost.
Bob
Hello. I have a laptop that I am trying to fix for someone. When it turns on, it says:
Ready for EC/KBS update. Place the EC/KBS update diskette in the drive, and press any key when ready to proceed.
Can anyone help me with this?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic