My Sensation has s-off, h-boot 1.29
Flashed JB 4.3 asop rom last night, booted, and all was well.
I turned off wifi and left phone without charging over night.
The battery had drained a lot overnight (down to about 30%) so i checked battery stats and saw wifi was on 100% of the time...even though I had switched it off...and the phone was very warm.
I rebooted and now it wont start. No Leds lighting. Swapped my battery and still wont boot.
Connected to PC and i see QHSUSB_DLOAD
Left charging with and without battery for a few hours but still the same.
Most guides appear to show this happens when trying to s-on or flashing but my phone was working until i restarted.