mobile

First of all thanks in advance.

I downloaded a nightly " ..........406" (CM12) for OPO.
I flashed it in the recovery. While it was installing "Zip file is corrupt" This came in the coding. (I didn't clear cache)
So then I clicked reboot system but it was stuck on the oneplus one logo.
Then I flashed previous nightly and cleared the cache too but it was still stuck.
So what do i do now?
1. Go to advanced wipe and clear everything except Internal storage and flash the nightly again?

I do have a nandroid backup but it's in my pc.

HELP PLEASE!