A standard IDE cable is not typically used in a laptop. A standard IDE cable is 40 pins and power is not defined for any of those pins. So, the typical hard drive will have a second cable used for the power, a cable with four pins on it. (2 for ground, 1 for +5 and the last for +12v.)
The laptops I've seen usually have just one cable on it, which makes for a simpler connection. That cable has 44 pins on it. I would think that 40 of the 44 pins might just be the same layout as a standard IDE drive, but which 40 of the 44? the left 40? or the right 40? And as for the 4 additional pins, what are the ones for which voltage or ground. Guess wrong and I'm sure you will fry the drive.
I do not know if all laptops use the same layout of the 44, but they probably do.
Sounds to me like you have some researching to do. I'll bet you can Google it.
My daughter has given me a dead laptop that she aquired from her company. The hard drive seems to be at fault and when booting up using a boot disk and go to fdisk it says no disc installed.On taking out the hard drive there only seems to be a IDE type cable attached to it with four pins at the end not used, should there be a power supply to these four pins or is the power supplied via the IDE ribbon cable. I will thank you in advance for any help you can give me. Kindest Regards Tony B.