Be shure to contact Ikelite and explain the problem, I had 3 of thoses (now down to only 1) strobes, and know for a fact that they do not repair thoses anymore.
if your ready light is on and blink ever so little when you trigger it possibly is flash failure.
if your ready light is on and no sign or fluctuation appear when you trigger, then that might be the trigger coil. BTW those big black tube with contact at the end (Capacitor) contain 600 + volts, so please don't touch then or stick your tongue on them, If you do you will remember the moment for a long long time 
There is a rubber band around the black front part, under it are some screws this is the way in, but better yet, bring it to a place that do repair on studio flashes, they are more qualified than camera repair shop for this kind of repair (I am a former camera repair technician). they should be able to fix it, I reccomend this first because if you don't know what your looking for you will most likely cause more damage than good and second any technician that receive equipment in which he or she suspect the owner as tryied to fix will most likely reject doing the work since he/she as no idea what or what was not by you, (in short a technical nightmare
)
I have a friend who might have an address in Poland for you to begin searching for a cure, I will get back to you on that one.
Good luck