The three beeps indicates faulty, incompatible RAM or the RAM isn't sitting properly in the respective RAM slots.
Who makes the RAM and where was it purchased.
Correct and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com). If you are not from the U.S., both OWC and Crucial memory have international shipping. Crucial memory has multiple websites that cover the entire Earth.
Corsair RAM can be unreliable and unstable in a Mac.
Some users have reported no issues, but other have also reported problems with this RAM.
Return it and purchase 100% reliable and compatible Mac RAM from OWC or Crucial memory.
Their memory is guaranteed to work without issues in Macs and have a lifetime replacement warranty if their RAM should fail or is found faulty.
If thats a 2004 G5/2.0....
If you're sure the RAM is good, try the Hair Dryer trick...
No power light at all...
It can show on any G5, and even many other computers & electronic devices of the period.
And see this last one in particular...
Heat gun better...
On the Hard Drive, make sure it is SATA 1.5Gb/s compatable.
To use Mac OS X 10.4 Tiger, your Macintosh needs:
* A PowerPC G3, G4, or G5 processor
* Built-in FireWire
* At least 256 MB of RAM (I recommend 1GB minimum)
* DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation
* At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools (I recommend 20GB minimum)
Apple may even have an International version...
See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...
Or Ali Brown's great info on where/how to find/get Tiger...
* Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor
minimum system requirements
* 512MB of memory (I say 1.5GB for PPC at least, 2-3GB minimum for IntelMacs)
* DVD drive for installation
* 9GB of available disk space (I say 30GB at least)
Classic/OS9 Apps no longer supported.
May be available from Apple again...
Ok, I'm not sure the installation went well. I formatted my sata hard drive Mac osx extended(journaled) and APM
Based, I checked it in my actual new working Mac and it had no files, just 4 folders, but when I boot up, it shows the Mac boot screen, then after 10 seconds, it shows me the kernel panic, which says it has no driver installed for the power Mac g5.