Had the same problems with my new AZ11E w/ Thunderbird 1.2 GHz. Had to remove the MB from the case, pull the power from the wall, remove all cards except video and memory, cleared the CMOS for greater than 10 seconds. After this I powered up with the "Insert" key depressed. Got continuous repeated beeps, (wrong memory type or cards) replaced with an old stick of PC100 and it booted up. Remounted everything and I was on my way.