Problem with stuck button

I have a Sony LCD Data Projector model VPL-CS2. The problem is that when I turn on the projector, the lights and fan work, but the projector just displays says S-video. I pulled the cover off the projector and found that the tiny power button is stuck down. The button is approx 4.5mm x 4.5mm in size. The board details >EP-(GW+GN) 1-675-798-12 (171763812). Any ideas on how to unstick button or replace button or board?

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