Advent Centurion Ci 5231 push button switch

[Rikki]

Hi firstly really sorry for bothering you guys, with which is probable a really stupid question, but yesterday I went to switch on my PC switched on the power then pushed the PC start button and nothing happened, pressed it again and it worked, to be honest did not give it much thought, but again this morning same thing although It took about 5 or 6 presses before PC started up. So I checked around for a new switch, no luck even though I tried the Advent partmaster site amongst others. So easy question I hope can anyone help me find a new switch ? or do you think it could be something else.