my phone doesn't turn on

phone doesn't working
hello,
I tried to install new ROM (my first time ) , so I unlocked it using section 1 in this link :
http://forum.xda-developers.com/show....php?t=2076086
and after this I tried to install this ROM:
http://forum.xda-developers.com/show....php?t=2445392
but I got an error(99) in this step : 2.fastboot flash zip firmware.zip
so I plugged off the phone from the PC , and it became bricked I think.
when I try to turn him on it shows me the HTC logo and then only black screen.
I was able to get into bootloader menu and the recovery.
I know nothing about this , what should I do now? how can I fix it?
thank you