Gotta agree with Kerrash, don't see any commonly listed or known bugs on this when I searched just now.
If you can elaborate and explain the sequence of events, possibly your ship build on a shipyard app like this:
http://coriolis.io/
Things that pop into my head:
Do you have enough power to run your ships equipment? If not it all disengages when you deploy hardpoints unless you set power priorities up.
Was this when you were under attack? If enemies get direct hits on thrusters or powerplant etc it degrades their functionality and can cause malfunctions like mis-fires and stuff.
Did you die or just stop being able to do anything?
Honestly never heard of this so I'm interested and want to try and help. Given it's not in the bug-reporting forum the best way to show this is to take a quick vid of the event ideally with your right hand modules panel (one with all the thrusters etc listed) showing as it all goes wrong. Screenshots as Kerrash mentioned are also very very useful at diagnosing.
Give us the data and we should be able to say if it's a bug or not. If it is truly a bug (very possible) then this needs to be reported since it currently isn't being addressed as it seems very few people experience it.