How do I know if Caps is on my K330 Logitech Keyboard?

The MK550 does not have a Caps Lock light on it. However, if you install the Setpoint software it will indicate on the screen when Caps lock is turned on.

I you want to purchase the same model or newer ones that came after that go to www.logitech.com and buy it direct for around $40.00. Otherwise Wal-Mart, Kmart, Best Buy, Target sells wireless Logitech keyboards. Just google wireless logitech wireless keyboard and you will see a listing.

I had the same problem and found the solution in a ubuntu forum. Although I use ubuntu, I am currently using windows and oddly enough the solution is same for both platforms. Just change your mouse settings to stop using numeric keypad on your keyboard as mouse. In windows 10, type "Ease of Access mouse settings". Turn OFF "Use numeric keypad to move mouse around the screen". And that should fix it.

there should be three lights just to the upper right of the keyboard. experiment abit with your caplock key and watch the lights. Caplocks on for my particular keyboard is the center light as it seems to be on must keyboards.

Usually there is a light that will light up on your keyboard when caps lock is activated. Press caps lock again to turn off the light and thus turn off caps lock.

I have the same keyboard and it does not have a caps lock lamp.
The only way of knowing if the caps lock is on is to type something in a text window although some websites will tell you if your caps lock is on as this can cause errors when entering passwords etc.

Keyboard types double letters, especially 'a'. This is my second wireless keyboard. Is there a solution?

The lights may be on the reciver

Well I guess you will know when you try typing, if there is no light indicator on the keyboard ( well there just dumb ) and you can't do anything about it.

If you have the Setpoint software installed from logitech, it will show onscreen when you press caps lock.  eg CAPS LOCK ON, or CAPS LOCK OFF when the key is pressed