There has been no additional equipment added to the room, although there has been a replacement. The items in the room are 2 desktop computers, 1 laptop (plugged in), a printer/fax, 27in TV, VCR, 2 lamps. All items are usually on daily, execpt one lamp. One of the computers was replaced with a higher end model. All of the computers are plugged into a surge protector.
I also have a space heater which was on when the breaker tripped the second time. During my research I read that circuit breakers can go bad after 10yrs; my house is about that old.
Does it look like I need to replace the breaker? If so, can I do it myself or do I need an electrican? How much can I expect to spend?