Intel Core2 Duo Sony Laptop, osx wont boot without power cable

[opendns2008]

Hi

 

I have search all over the forums looking for a topic on this and couldnt find one, but I do apologise if this has already been answered somewhere else.

 

I have installed osx using iaktos on a seperate partition of my sony vgn-n31z laptop with xp on the other partition, and they both work great, if the power cable is plugged in, and there lies the problem! I cant boot into osx without the power cable installed but I am able to get into xp.

 

I have found another forum mentioing that it may be a problem caused by intel speed step, but i dont have an option to disable this in the pheonixBios. I have tried adjusting the power schemes to full power and used NHC to set to max power.

 

I was wondering if anyone else can shed some light on the problem for me

 

Thanks in advance for anybodys help and advice

Thom