So, I finished my sammichSID last night!! And I was just thinking the screen was a little dim - I had the brightness trimpot at about 12 o'clock - and so I turned it up a little. I turned it to about 3 o'clock and it worked well for about 5 seconds, then i heard a small quite pop and saw some smoke - so I turned it off straight away! I opened it up to look for an signs of damage and saw none, so foolishly I turned it on again (bad idea) and it worked ok for a short time and then the screen backlight went out. so now I am sad.
I assume there is something wrong with some capacitors that do something for the backlight power circuit, but I am a bit out of my depth. The kit was entirely finished except no SIDs were installed. Any idea where to start looking for the problem? the screen I have is the (high power?) green backlit screen (the default kit option) and I am using a 12V 1000mA power supply.