[HTC Vivid, Raider, Velocity] al.romashko:
I found similar problem wich one user had with HTC Desire that now I have with my friend's Vivid. Here what he have posted:

So my history started 3 days ago from the call from my friend, to whom I am godfather of his son, and told me that his Vivid can't load and stuck on white screen with htc letters and can't load. I was looking throw this forum and decided that bootloader is broken. So I downloaded the file PH39IMG.zip of ~35 MB and after loading in fastboot with Power+Volume Down have updated. After this the Vivid rebooted and was working good so I returned the phone to my friend. In 2 days after he told me that he has problems again: he tried using wi-fi at home and as he told "It was not working" so he went into settings and chosen Factory reset. After this phone stucked on white screen and nothing else, so he asked me to help him again (because everything he can do with Android is backing up his contacts :D) also he asked me to flash some custom ROM on JB. But I decided to recover in stock ROM first. So I started from copying the stock ROM renamed into PH39IMG.zip to sd card. Then loading into bootloader I confirm the update. It has checked and updated all strings and rebooted. After this it has started updating again but there were more strings than before. On the string User data update was stucking in about the half. I was waiting for more than 3 hours and realized that something wrong with it. So I switched the phone off by taking the battery out, I loaded in bootloader and decided not to spent the time but to start unlocking bootloader, getting S-OFF, flashing the CWM or other Recovery and finally flashing the custom ROM. I have to say that I have drivers installed from Android SDK, as I was working before with different Android devices and everything was successful. I have to thanks you guys as all I did before were found on this forum which I am regularly reading for more than 1 year. I also have adb tools and Vivid_All-In-One_Kit_v2.2 installed. So using the last one I started from unlocking bootloader. I did all steps and after receiving Unlock_code.bin file and pressed Unlock bootloader in Vivid_All-In-One_Kit I got screen on the phone for unlocking the bootloader. Off course with the help of Volume Up key I've chosen Yes BUT (!!!!!) pressing the Power button of the phone did not do any action - it just like this button was not working! I had to take the battery off and boot in bootloader with Power and Volume Down and it is loaded, so Power button is working, but the banner of bootloader was "LOCKED"!!! So after reading different topics as I didn't make unlocking, S-OFF etc. I decided to update stock ROM with the help of RUU_HOLIDAY_ICS_35_S_Cingular_US_3.26.502.56_Radio_3.02.4740.14_34.22.701040.19_release_246712_signed.exe

It has started with such screens:

View attachment 1643102

Then it was going and stucked on 34%. I was waiting for more then 1 hour (it was a notification that update process will take about 10 minutes) but the screnn was the same 34% and looking like still updating as status indicated by dots running was in progress:

View attachment 1643077

So with no any ideas I decided to unplug the USB cable and I got the following:

View attachment 1643086

So I have plugged again and followed all steps with unlpugging/taking battery off and in/plugging and here what screens I've seen:

View attachment 1643079

View attachment 1643080

View attachment 1643078

And after resuming update I got the same stuck on 34%!!!!:crying:

And the worth was that now I got a black HTC screen with 4 exclamation marks 1 in each corner:

View attachment 1643110

and when I take the battery off and then put it on it shows the same after turning the phone on (and it's no matter if I just press the Power button or trying to load bootloader with Power+Volume Down) - same screen. If I plug the USB cable and then unplug it will show the following:

View attachment 1643111

What is interesting is that when I plugging USB and run cmd under Win7 and no matter where to go in root of my Win: ADB_Tools or Android or Vivid_All-In-One_Kit_v2.2 folders and running the fastboot devices - it can see the phone:

View attachment 1643103

but when i am trying different tricks in Vivid_All-In-One_Kit_v2.2 such as unlock bootloader it is give such error as device not found:

View attachment 1643104

and when I am trying to flash the kernel I got such result which seemed to stucking:

View attachment 1643159

As I understand I got the soft-brick?

I even have no ideas what to do, as I am in Ukraine and Vivid is US model, so I am afraid visiting the service centre will take so much time to do something with the phone...:crying:

So I have only the last hope - suppose on your help, guys!

Sorry for possible mistakes as I am f...ing with this Vivid the second day and have slept only 3 hours yesterday and will sleep only 2 hours today as it is already 5:39 AM in Ukraine and I have to get up at 7:30 to send my kids to school:(