Test scenarios to test login password screen are:

1. Test for blank feilds (both)(Null value).
2. Test by putting wrong id and password.
3. Test by putting username with password as blank.
4. Test by leaving username as blank and putting correct 
password.
5. Test by putting special characters.
6. Test for putting wrong id and pwd for more than 3 times, 
see what happens? as in case of credit cards or atm pin, 
entering wrong data for 3 times, block the card.
7. Test for user which does not exist.

Hey, Poonam

Thanks
I am greatfull to u.

This Answer has given me the confidence that Some time I am 
also right. 

Thanks Again.

There are so many test cases for Testing Login and 

Password Screen.The Imp test Cases are as follows.

1.Test the screen with Login and Password blank.
2.Test the screen with valid Login Name and blank Password.
3.Test the screen with invalid Login and invalid password.
4.Test the screen with valid Login and valid password.
5.Check the screen with invalid name and valid password.
6.Test the screen with valid name and invalid password.
7.Test for no of chances to enter valid password.

Hi Pankajraijade

Poonam & Dayanand Patil told correctly. But whenever ur 
start writing test cases start with positive testcase.

Give Valid user name and password and then go for negative 
testcases

1.Not Enter loginid and password click "Ok"Button
2.Enter Login id and ont enter password click "Ok"Button
3 Enter Password click "Ok"Button
4 Enter Invalid loginid,password click "Ok"Button 
5 Enter invalis login id and correct password click "ok" button 
6 Enter special character in login id field 
7 enter special character in password field 
8 enter correct login id and password click "Cancel"Button
9 Enter correct login id and password click "Ok"Button 
10 enter correct login id click "Cancel"Button
11 enter correct password and click "cANCEL"bUTTON
12 Enter invalid login id and password click "Cancel"

1.Successful Opening of  Login password window.
2.After opening login window the cursor should point to the 
Login id text box.
3.Enter valid Login id and press OK button and check for 
the error message window"enter valid password".
4.Enter valid password and press OK button and check for 
the error message window"enter valid logoin id".
5.enter the loginid exceeding the limit and check for the 
functionality.
6.enter special characters,numbers,combination of both and 
check for the functionality.
7.the password should be in encrypted format.
8.Enter valid id,password and click on cancel,the cursor 
should point to the id along with the reset values.
9.Enter valid id,password and check whether the OK button 
is highlighted.
10.Enter valid id,password and click on OK button for 
successful login of the window.

Did you guys consider ? what is your role to write test cases an don which phase you are writing test cases ?

Against to what actual requirement you are writing such test cases ?

Or this is just for common Login /Password routines? ge