500 mhz iBook won't sleep with new hard drive

the front panel LED no longer pulsates or even lights up, and the unit will not go to sleep.
Oneguy wrote on :

A sleep deprivation problem.

After carefully installing a 40gig IBM Travelstar in place of the original 10 gig in my 500 mhz white iBook, the front panel LED no longer pulsates or even lights up, and the unit will not go to sleep.

Can anyone please advise or tell me where to start looking for an answer?

Many thanks,

O.G

(Replies to the group, please. Cross-posted to two other groups, with apologies.)

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