[Desire HD Q&A, Help & Troubleshooting] cekobico:
I'm very sorry for the vague title, but I really am.

Full Story:

HTC Desire HD is my first Android device and after using it for months, I got bored with the fact that its OS is Gingerbread. The latest one I read is Jellybean, so I began adventuring in hopes to experience it with my current phone.

First of all, I have no knowledge of programming whatsoever, especially that my laptop is Mac (and I rarely do anything involving Terminal). Down further, I might got my terminology wrong and confuse you readers. I apologize for that.

So after few trips to Google, I found this article on this site and immediately apply it step-by-step. Be aware that although I mentioned Mac being my laptop in the paragraph above, I was using my family's desktop to do the required instructions.

Apparently, I got stuck at step 6, telling me that I should downgrade something on my phone, which I did. However, after doing that, my phone was stuck in the HTC logo screen. I couldn't get my phone back on for normal usage. It's just stuck there, not moving. White background, and a green HTC logo.

I did few searches on the site, and consulting to my friend who is experienced in rooting, turns out I need to unlock my Bootloader first before rooting.

Then, I went to htcdev.com to proceed with unlocking my bootloader. There, I was presented with a brief telling me that I should install an RUU to begin. I cannot find my phone there, because I bought my phone in my country, Indonesia, and here we don't have any carrier-contract system. So the phone I bought had no carrier brands like other model distributed outside my country (Virgin-Mobile, Brightstar, Vodafone, etc).

In a midst of the confusion, I decided to download the one with a HBOOT number similar to mine, 0.85.0024. The one that I downloaded is

PD9810000_Ace_Gingerbread_S_hboot_0.85.0024.exe

I ran the .exe file and after the process is finished, I am presented with a dialog box telling me that my ROM is not supported and I should wait for the day in the future where my phone is finally presented with an update.

And now here I am, stuck with a non-working phone. I tried searching for similar problems with mine, but nada.

TL;DR

I ran the Advanced Ace Hack Kit without unlocking my bootloader firsthand

Went to HTCDev site to unlock my bootloader, but my current ROM is not supported yet.

Now I'm stuck with a white screen and a green HTC logo.

My phone info from the Bootloader:

The first few minutes after entering the Bootloader, I got this message below

and nothing happens after that.

My phone info from getvar command

Solutions tried:

Pressing the Recovery option in Bootloader gives me a picture of a phone with a red-triangled exclamation mark on a black background.

Wipe data/factory reset from VolUp+Power command in the aforementioned red-triangled exclamation mark above. Data wipe is complete, but I'm still stuck with the green HTC logo on a white background.

Factory Reset from the Bootloader brought me to a black screen and a phone with a Sync logo on it and a small loading bar with a SD card logo underneath. Then, it takes me back to the green HTC logo screen again.

Any suggestion of what I can try? I'm still hoping I can finish what I started, which is getting my phone to Jellybean by rooting. However, if it's impossible, I could care less as long as I can get my phone back to normal.