[QUOTE=ak074;46375168]after selecting recovery from the bootloader, wait 40 seconds after the screen goes black. you should then see the red triangle and exclamation mark. you can also just hold vol up and keep tapping the power button. if you do it right, you should see yellow text at the bottom that says "Mount SDCARD failed 1 times" then 2 times, 3 times, 4 times, 5 times. this is what the phone is doing while the screen is black. pressing vol up and power a few times enables this to be shown. when that's done, you will see the triangle as you are used to seeing. hope this helps! hit the thanks button if it does
After I did the volume up and the power button some tiny text came up on the screen (green) and went thru the routine you described and a green triangle came up and written underneath it said ANDROID RECOVERY or something like that. The text was so small I had to use a magnifying glass to read it. While in that recovery you have the option to wipe the cache partition, apply from sd card, apply from phone storage,apply from cache and wipe data / factory reset. So evidently this phone's recovery is wierd. HTC probably didn't expect anyone but developers to use it.
Sent from my 4G LTE HTC One
Galaxy Tab 10.1
Kindle Fire HD