I tested the unit with the 12V wall wart, and I still get the blinking light problem (so it isn't the power filter). I looked on the board again, and noticed that one of the capacitors looks blown. The X on the top has seperated and you can see inside the capacitor (I will add pics later when I get my camera). The rating of the capacitor is 25V 220µF. Should I try replacing the capacitor, or would the other components be fried also? The polarity was inverted when it was plugged into the car. I heard a pop, and that is the only apparent damage on the board. Also, if replacing the capacitor would not work, does anyone have boards for the 629GL (I have the TS and LCD) for sale? Thanks.