Issue booting to ANY HDD solved by reinstall on ONE HDD? How does that work?

Epitome_Inc

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Oct 28, 2013
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I work in a community college as their IT guy and had a strange situation that I was hoping someone could explain.

I have a Dell Optiplex 380 that was stuck in a boot loop. The very second it tried to boot from the HDD it would reboot and keep doing that forever. It was so quick I was pretty sure it wasn't a MBR issue. I figured there must be something wrong with the mobo, because when I tried a different HDD it did the exact same thing. I also tried setting the BIOS back to defaults, and verified it's running the latest BIOS version. After spending some time talking with Dell support they suggested I try booting from a Windows installation disc and doing a fresh install. Against all logic that fixed the issue. When I asked the Dell support tech about this he just said "It's a Windows thing." So my question is: What would a fresh Windows install fix on a system that isn't directly tied to the HDD itself? Is there somewhere on the mobo that an install writes to that was perhaps fixed by this? Thanks!
 
Solution
I'm not sure what it was but I can tell you right now that neither did Dell support, because it is defiantly not a problem with Windows. It might have been a problem with Dells drivers that they have, because I know on most of their PCs they have a chip on the motherboard that runs under the OS, but the OS can access it. So it might have had something to do with that.

Spartin503

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Jul 24, 2012
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I'm not sure what it was but I can tell you right now that neither did Dell support, because it is defiantly not a problem with Windows. It might have been a problem with Dells drivers that they have, because I know on most of their PCs they have a chip on the motherboard that runs under the OS, but the OS can access it. So it might have had something to do with that.
 
Solution

Epitome_Inc

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Oct 28, 2013
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Ok, thanks Spartin! My supervisor and I were wondering if it was something like that. Seemed like the only plausible explanation. I was trying to find something on Google to substantiate this and share with my colleagues here. Any suggestions on what to look for specifically?
 

Spartin503

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Jul 24, 2012
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I looked around for a while and couldn't find much. So, I don't have any specific places, but I know that Dell uses custom motherboards with custom chipsets. And inside the custom chipsets they have a back door that they can access, so when someone get customer service they can control your computer over the internet before it boots. I would think that something went wrong with the software for custom ACH7 chip they used in the 380.