it was quite windy i am wondering if the force of the wind might have moved the connectors .. i have now sent it for repair
No chance in heaven that any wind will be strong enough to move those connectors if they are tightly plugged in, a strong wind might be able to move the whole miner a few meters and still won't move those connectors, I still remember unplugging about 50 miners straight and my fingers kept hurting for a few days, those connectors are pretty tight unless they go through a dozen plug/unplug attempts which makes them loose.
One more followup on this issue, I am using a PSU which is 2300 watts but S9i consumes only 1320 watts, will that be a problem? do i need to change the psu with a smaller one?
I tend to believe that your PSU is of bad quality and it was the reason why the pins were burnt, I have tested over 5 different brands of Chinese PSUs, the only "ok" brand was Lianli although I would still rate it at 6 over 10, get the original bitmain PSU as it's rock-solid, if not, then get an EVGA or one of the good PC brands PSUs, avoid the cheap Chinese PSUs at all cost.