WHEN YOU PRESS THE CAPS LOCK BUTTON YOU HAVE THE CHOICE OF UPPER AND LOWER CASE LETTERING BUT THERE IS ALSO AN ARROW BUTTON WHICH IS TURNED OFF AND I AM NOT ABLE TO TURN IT OFF IT SEEMS TO HAVE REVERSED MY UPPER AND LOWER CASINGS BECAUSE NOW WHEN I USE THE SHIFT BUTTON MY LOWER CASE WORKS. COULD YOU PLEASE HELP THANK YOU!

Shift for one letter, Caps lock for all caps. Lower right and left of keyboard on most computers.

On I phone, there is an arrow on the lower left - tap once, it will turn dark, and will cap one letter. Double tap, and it will use all caps, until you release by tapping again.

Go into device manager in windows and delete it and reboot. If it comes back when it detects the keyboard and it works then it was a driver, if it does detect it or it wont work correctly then it is a bad keyboard. You can also try a plug in keyboard to see how it behaves, ps keyboards are not that expensive.

Upper and lower numbers, or letters? I don't know anything about lower numbers. But you press the shift key or take off the caps lock to change from upper to lower case and vice-versa.

Capslock on the iPad is done by double-clicking the upper-case button. Double click it again to bring it back to regular lower-case. If not, restart the iPad.

Passwords are case sensitive, make sure that you do not have caps lock turned on if your password is all lower case, if there are any upper case letters be sure to make them upper case (Eg; If the password is "Password" you need to capitalize the P and make the rest lower case)

If you are typing using the touchscreen, the upper-case arrow, touched once, will upper-case the next letter you type and then back to lower case. It you touch the upper-case arrow twice in a row, you should see a green light come on directly over it. That keeps the caps lock on.
If you are using the slide-out keyboard, touch the upper case key once and you should see a triangle underneath the cursor on the screen. That will upper case the next letter you type. To get it to stay in upper case, hit the upper case button again and the triangle should change to a > symbol, point up, underneath the cursor. That should keep it in upper case mode. Don't hold the upper case button down, as that won't do anything. A third press returns it to normal (lower case).

When in text mode, press 1 (one) then press 0 (zero). That works on my Motorola Tracfone.

press caps lock and F9 together see if that fixes it

You must read the manual paper off.

Is the caps lock light illuminated? If so, you might have to hold shift and hit caps lock to turn off the caps lock. This is an option for old typists who came from manual typewriters that you might have turned on by mistake.