MacAir over 45 Second white screen on startup

Prepared New MacAir (Lion), wiped all partition, install  via DVD and install only Windows 7 64 bit Enterprise with no mac partiiton, on powring on get white screen after teh startup sound which stay for over 45 sec, but if I hold alt/option during startup, white screen stayes for 15-16 sec and get bootdevice menu, selecting the HDD to boot get windows login screen in 5-7 sec, which is way better then looking on white screen  for over 45 sec, seems searching for boot drive or some like that, Any help will be appricated, Thanks

my question is not related to changing the screen or so, I am concern about the long delay before system boots up, it was not the issue with previous MacBook Air. not sure may be the new MBA is looging for wireless network as it have option to boot from wireless network, if so can we disable some how not to look for wireless network?

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