HTC Desire 500 need help!

I have an HTC Desire 500 and today i decided to root it, the battery was more than 80%, I unlocked the bootloader with no problem, I flashed the recovery to get the CWM and I installed supersu.zip.
Then, I rebooted. After that, nothing happened, i get a black screen, I tried to pull the battery and put it back and when I charge the phone, the orange LED flashes and i can hear 7 buzz every 3-4 minutes. Please help me, tell me what to do!!!!

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