How do i get my alpha key work

Yes, yes, and yes.
You may view/download a copy of the manual at Owners Manual User Guide for Sharp el 531x scientific calculator
You'll find examples of exponential and logarithmic calculations in the second column of the second page and the memory instructions in the fourth column of the first page.

Since you decline to specify the make and model of your calculator, I can only give you some examples.

On a Casio fx-115ES, press MODE 4 [BIN] . BIN is on the log key.

On a HP 16C, press the BIN key.

On a HP 50g, press ALPHA ALPHA [B] [I] [N] ENTER or right-shift [BASE] D .

I have no idea what type of log problems you want to solve. It does help to know what you have in mind. To type in the log function log(, you have two ways:
1. Use the keyboard to type it in on the command line APLHA L, ALPHA o, ALPHA g followed by opening parenthesis. Or if you can LOCK the alpha keyboard, lock it and press the keys corresponding to the letters l, o, and g.
2. Press [Diamond key] [7]
The last trick works on the TI92 and TI Voyage 200 PLT which have a full fledged keyboard. Try it anyway, if that does not work you can still use the ALPHA keyboard.

if you don't see it on the screen thats because it's changing the number into a letter (1+alpha,alpha=Z).
If the key is not working it needs a new key pad.

You press [alpha] then [f3] to open the func menu. Use the arrow keys to highlight logbase( and press enter.
then type in the value , base). Keystrokes would be [alpha] [f3] arrow and select logbase( , then [1] [(divide)
[4] [,] [4] [)] [=] . (your screen should look like logbase(1/4 , 4) = -1.

For natural logarithms, you can use the ln function (2ND shift of the X key). For example, the natural logarithm of 3 is 2ND [LN] 3 ) ENTER.

For logarithms to other bases, use the log function (diamond shift of the 7 key). For example, the base-2 logarithm of 16 is diamond 7 1 6 , 2 ) ENTER. If the base is 10 (common logarithms), you can omit the comma and the second argument.

the security key usually is alpha numeric and u have to make sure u type capital letter wher it shows capital letters. try it n c if it works.

else u will have to change the key. *** bak to me n temme if the above worked.

Green 7

Did you try to use the "alpha key"? Press the number key that has the letter you need, then keep pressing the alpha key to get the letter you need.