I've had startup problems in the past. My expiernce had a periphial, in this case an external hd, that for some reason would lock up my computer when it was turning on (still don't know why... it was sporadic at best). I would first suggest you rule out everything else first before you go fiddlin w/ the bios.
In any case, the reset open case status... i want to say that its probably not being utilized in your comp... but then again i could just have the wrong idear in my head.