I think the Tsar lost power due to mainly mutiny in the army. The army is a core part of a governor's rule and with the army on your side,a one can rule virtually any way that he /she pleases. The Tsar had a rule which came to be known as Tsardom which was basically an autocrat and is based on this idea.

At first, the Tsar had power as the army was on his sideThis was shown with the events of January 22 1905.It was a peaceful demonstration as the Russian people wanted revolution, but also a certain amount of other issues were at the root of the demonstration such as hunger and anger at the events of the Russo Japanese war.

Due to the fact that the army was loyal to the Tsar, they opened fire on the crowd from which the day was called Bloody...