I am using desktop machine with LG Lcd screen monitor with Windows XP.
After increasing my monitor resolution,it became blank though my PC is on!
I restarted PC,but Monitor displays blank screen....so that i cant do anything on my PC!
after changing your resolution you should have waited for 15 seconds instead of rebooting it straight away it will revert after 15 seconds
now you have only this one option left which hang-the-9 told you