Hi hazard
Check this thread for opening the front trunk.
http://986forum.com/forums/performance-technical-chat/62706-how-open-hood-when-battery-good.html
I have the same problem with mine I had about 10 to 15 litres of water under the front seat from blocked drains. My board was like yours and had corrosion on it like yours. I cleaned it with alcohol and it still had the same problem but mine would start but key buttons would not work. So I removed the seat again removed the board and sent it out to a company here close to Ottawa and I received it yesterday. I will try to install it today if it can stop raining and will let you know if it works.