Replaced HD, now screen won't work

[Macman45]

Missing The Blindingly Obvios

Or I could be being dumb. BUT

Your new HDD has noOS installed.

If you have you original OSX install DVD, put that in the drive and boot

Apologies if you have tried this already..

 

[wongson]

black screen for me too

Hi everyone, I just replaced a HD in a friends imac (2389 mid 2010) and have a black screen, I've checked all the connections, the seem to be OK, led #4 is not on, does that mean my LCD is defect, or could there be a damaged cable?
The data cable popped off when I took the display off, it looks undamaged, but then I'm hardly an expert...
The mini-display port is still functional, does that indicate the video-card is not damaged?
I was nót wearing an anti-static wrist-band when attempting to help my friend out....