Help with trying to start engine

Hi can anyone help I have nissan micra 03 1.2 AA came out and read fault codes, P0300+ so diagnosed as faulty coil pack.

I changesd all coil packs with micra from scrapyard and boom car worked for about 3 minutes then there was a bit of smoke coming from what looked like one of the coil packs...

I replaced the one which looked to have blown now It only cranks the once, then cuts out. if you try again you get nothing. If you lock and unlock the car you get 1 crank the first time you try then nothing after that. Just the fan spins constantly

Also, if you try to read the codes now on the OBD socket you get a "link failed" error on my and the AA's code reader.

Thanks.
 
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