Computer continuously beeps and won't start up

Had a client panicking the other day because her computer started beeping continuously at start up and wouldn't boot up.  This has happened to a couple people and the solution is actually quite humorous.  Well humorous to me anyway.  It turns out that on occasion a key on your keyboard will get stuck in the down position...this is bad because your computer reads your keyboard at start up and will not boot if a key is stuck down.  So if this happens to you just check your keyboard and make sure the keys are all up, ...The lady that was panicking was able to get back to work right away and I did not charge her for the "repair" but I did tell her i was going to Blog about it ....