[Desire HD Q&A, Help & Troubleshooting] AADAM H. AKHTAR:
Make sure you have USB Cable and a Memory card before doing this. ** WARNING ** Flash At Your Own Risk.

This will take 1 hour or maybe more, just make sure you follow the steps carefully and do it carefully. This thread is for people who have no access to their rom and have only access to bootloader.

If you tried to return to stock rom via Advanced Ace Hack Kit and you tried to flash the stockrom back on and it just crashed during the process and you just pulled it out the usb cable out of the phone, So you pull the battery out the phone and restart it. All you see is the htc screen which it is just stuck on. Well I have the solution how to fix this. You might think it is bricked and have buy a new phone well you dont! All the problem is that the Advanced Ace Hack kit the radio RUU they provided you with is either a old version or a corrupted one so the phone cant boot up properly. This thread I am going to tell you how to flash the RUU and put a custom rom on which is ten times better than the android 2.3.5.

You have to concentrate while doing this or you will end up with a dead phone.

So step one - Go to google search and copy and paste RUU_Ace_HTC_WWE_1.72.405.3_R2_Radio_12.28e.60.140f_26.04.02.17_M2_SF_release_163262_signed. go to the second link which says hotfile and download it.

Download the RUU_Signed File Via Hotfile, This will take sometime if you have a slow internet connection.

Step Two - It will say Welcome to the ROM Update Utility for your Android Phone also it will have a image on the left of the Desire HD. So click I Understand and click next so take the battery out of your phone and hold the volume down button and the power button, you will see a white screen with other selections so click bootloader to click it you have to click the power button to select it. So when you click bootloader it will go red and say FASTBOOT, So make sure the usb is in the computer/laptop during this process it will only go into fastboot if you have the usb connected to the computer first.

Step Three - Agree to all of the conditions and click next. Note: This process Will take sometime.

Step four- It will say Congratulations! your phone has been successfully been flashed! Now your phone is fully working and rooted so now your phone will reboot, If it doesnt power it on your self!

So it will boot up in android 2.3.5 because that was the rom that you were trying to flash via AAHK.

Step five - Open Advanced Ace Hack kit and make sure USB Debugging Mode is on.

Step six - There will be a option saying Hack Ace, This will root and install clockwork mod on your device, So type 1 and hit enter.

Note: this process will take sometime. Grab a cup of juice and crisps.

Step seven - The phone will reboot and will still be on android 2.3.5 so now you have superuser access and clockwork mod.

Step eight - Power off the phone and hold the volume down button and the power button, You will be in bootloader so now go down using the volume buttons and select recovery, to select this option you will have to click the power button to enter recovery mode.

Now your phone will be in recovery mode and will say Ace hack kit across the recovery screen, So now select wipe data/factory reset when it has wiped the phone select wipe cache partition, after that has wiped go to advanced option and select wipe dalvik cache.

Step nine - Your phone has nothing on it exept from bootloader and recovery! So now connect your mobile device to the computer and click mounts and storage, make sure your USB is connected. To complete this process make sure you have a 8GB Or 4GB Memory card in. So click mount USB storage, it will mount your memory card so you can access it through the computer to drag and drop files to flash on your mobile. You can download a Jellytime ROM on the XDA Forums So just choose which one you want and download it and drag and drop to the memory card while your phone is mounted to the computer via USB, Make sure you download a Google apps Package and flash it with it if it doesnt have the Google Playstore on the Rom. To Flash any zip files follow this - click unmount, go back to the main recovery options using the volume buttons and power button to select, go to install zip from sd card - select the zip file you want to flash then flash the Google apps Package after you flashed the ROM you want to have on your phone.

Last and final step! - Click reboot system now, your HTC DESIRE HD should reboot to the ROM you have flashed.

Congratulations! You have flashed and rooted your mobile device after being stuck in bootloader/fastboot mode.

If any problems just mail me or mail me via XDA Developers site.

I will help as much as I can to fix any problems.

Thank you for reading this thread and hope it helps.

AADAM H. AKHTAR