Originally Posted by Mr.Mike
Give me a model name and number and I'll be better able to help you search.
It's a Gateway MD7820u. I did end up finding a few on Ebay once I narrowed down the switch type (SMD tactile push button momentary switch if anyone's curious) but they are all flying out of China.
I just took the switch apart and cleaned the bubble and the contacts on the base with a diamond coated bit (no I didn't use a power tool) and it is working well again.
I'm gonna order some of the ones from China so I'll have them around next time, these switches seem to get corroded after a few years. Normally I replace them with something sturdier but this usually ends up with the power button being removed or cut, the customer wants to resell this machine so that wasn't an option.