This usually means there is an electrical fault and the devices protecting your installation are doing their job. If you cannot reset a breaker or an RCD unit then you need to have the cause investigated.
It's so annoying when something doesn't work. It could be that your lights have gone out or there is no power to your living room. This usually means you have a fault somewhere and until it is found and sorted you are stuck.
We have the skill, equipment and experience to quickly find and fix electrical faults and get the lights or the power back on.