I purchased a 600XL this weekend, it was never opened and everything was still wrapped in plastic when I opened the box. Plugged it in and it fired up but most of the keys don't work. I took the keyboard apart and cleaned the membrane with isopropyl alcohol and put everything back together but most keys don't work. Any thoughts on how to get the keyboard working would be appreciated. The reset, option and select keys work so I can at least play games but I'd like to be able to work in Basic.
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