[EVO 4G Q&A, Help & Troubleshooting] kennedystephen:
Any help would be appreciated ...

I got this EVO 4G phone 2nd hand recently. The device keeps rebooting at the initial white "HTC Evo 4G" splash screen. And I cannot access RECOVERY.

I CAN access the BOOTLOADER screen that allows me to switch between HBOOT, HBOOT USB, and FASTBOOT modes.

I CAN access the device using FASTBOOT

I CAN reapply the original RUU exe. The RUU process finishes just fine, but it still doesn't fix the phone. The phone still continually reboots.

I CAN reapply the same RUU version using the PC36IMG.ZIP method. Same experience - process finishes just fine, but it still doesn't fix the phone.

I CAN switch the device's BOOTLOADER from "UNLOCKED" to "RELOCKED" (and back again) easily using HTC Unlocker method via FASTBOOT.

I CAN flash a custom recovery image, but it never seems to "take". Meaning afterward, it still wont boot the recovery after successfully flashing the recovery image/partition. Just simply reboots over again.

I CAN download and setup the CORRECT Windows Drivers. All that seems fine.

I cannot get access to the stock recovery, even after the RUU flash seemingly completes successfully.

I cannot access any custom recovery, even seemly after I flash one successfully (tried RA, CRM, and others).

I cannot access "Recovery" at all. Either by using VOLDWN+PWR, or from the BOOTLOADER selection choice. When I try, it just simply reboots continually still.

Obviously, I cannot access the Android OS - so I cannot "enable USB debugging"

I cannot get access ADB. It has always said "No Devices Found" - the Windows Drivers are installed.

I cannot get unReVoked or Revolutionary to work. They always "waiting for device" even if the phone is in connected via FASTBOOT.

I cannot switch to S-OFF, since I really only have access to BOOTLOADER and FASTBOOT.

I've reviewed a ton of threads over the past 5 days. Tried everything I can think of, and everything I found on the internet.

I would like to ROOT this device, or downgrade it's HBOOT, or go to S-OFF. But the problems listed above have limited me from doing those things, in one way or another.

It's hard to believe that I can access FASTBOOT, and UNLOCK/RELOCK the BOOTLOADER, and "seemingly" flash images - and still not fix this issue.

The phone is not under warrenty. Sprint wont take it back or fix it.

This is a VERY SIMILIAR ISSUE to the thread http://xdaforums.com/showthread.php?t=187926

I'm looking for new ideas.

Is this the definition of "bricked"?

Is this considered the Bootloop of Death, and has no cure?

Is there a way to downgrade the HBOOT using just FASTBOOT? Seems like everything hates 2.18.00001.

Is there a way to flash a new KERNEL using just FASTBOOT? Would that help?

Any kind of help would be appreciated.

Here's my GETVAR ALL (using FASTBOOT):

(bootloader) version: 0.5

(bootloader) version-bootloader: 2.18.0001

(bootloader) version-baseband: 2.15.00.12.19

(bootloader) version-cpld: None

(bootloader) version-microp: 041f

(bootloader) version-main: 4.67.651.3

(bootloader) serialno: (hidden)

(bootloader) imei: (hidden)

(bootloader) product: supersonic

(bootloader) platform: HBOOT-8x50

(bootloader) modelid: PC3610000

(bootloader) cidnum: SPCS_001

(bootloader) battery-status: good

(bootloader) battery-voltage: 3809mV

(bootloader) partition-layout: Generic

(bootloader) security: on

(bootloader) build-mode: SHIP

(bootloader) boot-mode: FASTBOOT

(bootloader) commitno-bootloader: 4b46e889

(bootloader) hbootpreupdate: 11

(bootloader) gencheckpt: 1