I am not able to view the GRUB2 menu in my monitor...There is a small Green Box with the message "Hz?" ..I think GRUB2 is not able to determine monitor refresh rate...

The monitor is good as the OS loads properly.....Currently , since I am a regular user of linux I know the menu entries of GRUB2 ...For instance WIN is the 4 th entry Linux is first entry and so on..

Due to the display not there still I am able to boot with the help of arrow count..For Linux I just press "Enter" when the Hz? is floating around , I press Down arrow 4 times and press <enter> to boot windows

How do I get GRUB2 to show up??

I'm not that familiar with Grub2 but I'd suggest you take a look at the /etc/default/grub file. There are some settings in there which might help.

Here is ubuntu's tutorial on grub2 that has some display options

grub2

If this helps find the solution please post your results.

Dear Larry , As explained in the link you have given..

I edited the file using

nano /etc/default/grub

I uncommented the line

GFXMODE=640*480

I added supported resolutions in the order of my preference..I read that GRUB2 will try the resolutions in the order of preference separated by ","

My LCD monitor resol is 1360*768

so , I modified the line above as

GFXMODE=1360*768,1024*768,640*480

I gave 1024*768 to be on the safer side if the native reolution did not work

I saved and rebooted ,

GRUB2 menu appears beautifully now!

I am glad it solved that easy. I would have guessed wrong. You did not mention it this happened on a fresh install, if you had replaced your monitor, tweaked grub or upgraded a module. To be honest I thought it might have been the hidden menu or timeout count.