yes, its normal for that to happen.
2 reasons.1. you havent locked your hdd.when the chip is turned off the MS bios cannot access the hdd because it is unlocked therefore you get the error2. you edited the dashboard files on the C drive
(this is probably your problem)when the chip is turned off the MS bios will not execute the xboxdash.xbe because it has been edited and therefore it is no longer signed. (Of course your chip will be able to load the same xbe)Solution:
place the hacked dash files on E or F drive
then edit your xecuter/evox bios to boot from F or E drive.
place unedited dashboard files on the C drivewhen the hacked bios loads it will execute the hacked xbe on the E or F drive
when the MS bios loads it will load the unedited xbe on the C drive
hope this helps
(if you dont know how to edit your bios then check out the BIOS forums)