Applied 7.4V between GND and RST pin.

Ok... so finally I got an UNO from one of my colleague and attempted to burn bootloader on my pro-mini.. Here was the result...
here's a link which i found helpful.. Arduino Pro Mini 3.3v and FTDI 3.3v upload errors - SparkFun Electronics Forum..
I connected everything as per the above post but connected the 5v pin from UNO to Promini's Vcc(as mine is 5v). During bootloading, the IDE gave the following error.
"avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check."
I found it really strange and concluded to replace my SMD chip. However, I wanted to try once more and hence gave a second attempt.
This time I connected 3.3v from UNO to Vcc(5v) pin of Promini and tried burning again. This time burning was successful with a message "Done Bootloading".
I didn't get what caused the ab
I tried uploading blink sketch(), but it failed showing up an error "
avrdude: stk500_getsync(): not in sync: resp=0x00"...

CONCLUSION: NEED TO CHANGE THE ATMEGA328 CHIP.