I really hope you can get this problem fixed... i am having a similar problem. I have changed my drive, and the ide cable, but the problem still happens.
I even reinstalled windows, and have now gone as far as to wipe windows and migrate to Ubuntu, but even if i just try to acess the drive from a freaking dos boot it still reboots when i acess the drive... My next option is to try a bigger PSU, since i'm wondering if the damn thing isn't what's causing the reboot. if that doesn't work i'm gonn try aand install a new SATA DVD writer...
I feel your pain....I have gone through EVERYTHING you have gone through. Changed IDE cables, reloaded windows, everything....
One an up note, I have resolved my problem. There is hope for you too.
Here is what I did.
Like you, I thought two things could be at the core of the issue....either the DVD writer was bad, or from what others online told me, the power supply could be on the way our, of just underpowered (it is a mongrel brand).
I bought a new SATA DVD writer and a new Thermaltake power supply (430w)to try.
When I plugged in the new DVD writer, the system no longer rebooted and I thought I had resolved the problem.
Then I tried the new power supply with my old DVD writer in the system and the system worked perfectly. So I figured the PS was that bad, or the old DVD writer drew too much power for it.
In any event, I wanted the bigger PS in so that I could also "unlock" the second core of my Sempron proscessor which I was able to do with the larger power supply. Now the Sempron has turned into an Athlon dual core processor!!
I kept the new power supply and returned the DVD writer. And the system is AWESOME now. I bet your problem is your power supply needs to be upgraded....