When something broke up

Dammit people :/ You could have told me that upgrading firmware can brick my mobile! I have no idea what to do now, it turns on, blinks and turns off immediately. I have tried removing the battery, upgrading again as described in service manual, restoring factory settings. Mobile seems pretty messed up now. For those fresh with my case let me describe you what steps I have made so far.

It all started when I tried to change software using service packages (recipe from service manual), so: removing battery, reconnecting,running Phoenix (from PhoenixSlayer), selecting NO CONNECTION, then flashing prommer, choosing software. In the middle of service procedure ? bam ? phone reboots and turns off immediately.
I then tried to proceed with flashing as described in service manual ? I turned off the phone again, removed battery, and flashed in N/C mode this time with Refubrish rather than Restore User Product? it looked as it was kind of working ? the phone booted up ok? but it took about a minute before it turned off again in the same way. Tried few more times ? no luck so far.
I am really pissed right now ? I have followed Service Manual word-by-word and I was sure it won?t let me damage my device? what should I do? Inb4: ?read service manual?, ?you?re an idiot?, ?RTFM?. I REALLY TRIED.