What will happen when a chakra is not open?

You will be energetically blocked in that region of your body and may have problems there.

There are seven chakras in all along your center. The first is at the root, or perineal area and is associated with the color red. They move upward to just below the naval, which is the sacral, then just above the naval (I can't remember the name of that one) Then there is the heart chakra, the throat, the third eye (right where you see hindu paint the dot) and finally the crown chakra. Chakras are energy centers along your body and they need to be in balance for you to be healthy etc.

When you speak of having it activated or open, you are referring to the third eye chakra only. It's the one that brings you to spiritual awareness. You might just want to do a search on the chakras on Google, you will find a better explanation there than what I can give; it's hard for me to put into words.

This is all mishmash New Age speculation and misinterpretation of chakras--a complicated concept developed in Tantric yoga and Hinduism of India. Chakras do not "open" or "close" or spin or whatever. They are developmental mind states--neuroses that is--and you "open" the chakra by getting over your neurosis. The chakras also refer to a loop of brain cells that when properly primed through yogic exercises, such as forms of:chakra shuddhi, "light up" and cause a shift in consciousness. Most of the material you will find on chakras on the Internet is garbage but people find it useful.