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No bootable device available

This is a friends computer and I offered to help repair it. It had a failed hard drive so I opened it up and replaced it with a working one. Now after putting the cables back and turning it on the DVD and HD will not show when holding ALT/OPTION on boot. If I just let it boot with the Tiger OSX disk in I get a flashing question mark folder. If I try to hold C while booting it does nothing.

I have verified that all cables are plugged in and I kept the computer open while performing the tests to make sure that no cables were detached during assembly.

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You have to format the HDD and install an operating system on it for it to boot. the flashing "?" means a valid System folder can not be found. If the proper Tiger install disk (or full install disk) is not used it will not boot the compter.

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I think you have the right answer here, but let me ask why my DVD is not showing as a boot option? It is the official Tiger OSX 10.4.3 disk.

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Check in your system profiler to see if your drive will read DVDs.

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@mayer - it is a CD/DVD Combo drive -

Apple CDD5301/89 32x CD-RW/DVD-ROM Combo Drive

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The drive could be damaged, Option boot and see if you can select it. To use Mac OS X v10.4, your Macintosh needs:

* A PowerPC G3, G4, or G5 processor

* Built-in FireWire

* At least 256 MB of RAM

* 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

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