2008 iMac Multiple Chimes, Black Screen

[Stig McNasty]

This may have been done to death but: Are multiple chimes followed by decreasing chimes, then repeating, with a black screen, the sign of a dead iMac?

Early 2008 24" iMac, top GPU, 2.8Ghz.

Thanks.

 

[PajamaPants]

Did you install or upgrade something?
I had the same problem when upgrading to a non compatible RAM in the same Mac.if I remember It means that there is a hardware problem, failing or non compatibility. I am sorry but I think that you need to go to the store that sold it to you to see how much it would cost to fix it.
The problem could be from almost everything, graphics card, logic board, CPU, HDD.
Actually you really need to go to a store or try to de-assemble it yourself trough iFixit or something.

Good luck!

 

[b06tmm]

You didn't mention how much RAM you have. Have you recently added or changed RAM?

According to this you may have bad RAM.

I would pull out one stick at a time to see if it will boot. If not, try each stick in another slot.