i have just brought ASROCK G31M-S.R2.motherboard........earlier i had intel D945G which was damaged.......my core2duo processor was in good health so i replaced it on new motherboard.....ram 2gb.I tried to install windowsxp proffesional........set the setup boot from cd/dvd rom in bios.put the cd of xp.......then i was waiting to see the screen with press any key to boot from cd........but the monitor shows HZ?......second time i put the cd again......and pressed enter key boot was going on in cpu but monitor doesnot show.........then as i knew the keys to press i pressed all the required keys ...setup file did copies...and then restated.....after that screen of setup which shows..copy setup file,copying startmenu items,finishing setup are comming in monitor.......then i intalled the driver cd .......sounddriver is working properly.......but when i installed vgadriver monitor goes in to sleep mode.....means....green light of monitor is blinking....so i went to safe mode and uninstalled the vga driver and restarted ,then the monitor did show the windows...........what will be the real reason for this.....?plz help me ,i have Samsung SyncMaster 794MG monitor.........