Yesterday I was playing with Link2SD and I tried to move one system file to SD card, after that I was stucked at hboot.
PG76IMG_Marvel_HTC_Europe_1.66.401.1_Radio_47.10g.35.3032H_7.49.36.01M_release_209754_signed.zip, from here.
I have unzipped the file, and manually updated ROM, using commands from command prompt:
fastboot flash boot boot.img
fastboot flash dzdata dzdata.img
fastboot flash partition partition.img
fastboot flash radio radio.img
fastboot flash recovery recovery.img
fastboot flash system system.img
As it is described here.
You will need files:
fastboot.exe
AdbWinApi.dll
adb.exe