I've been having some problems with the radio in my MK4 escort lately, I believe it's a sound 2000 model from 1990 or so. A previous owner decided to cut the original radio connectors off, I soldered them back on and it worked perfectly for about a week. But now I turn the radio on, it lights up but the screen is blank. It gets no radio signal either but it plays cassettes just fine. It doesn't even prompt for a code when it has been disconnected from the car which is something it did before. The same thing also happens with a spare radio of the same model I have lying around which leads me to believe it is something to do with the car itself. I checked all of the connections to the radio and they all seem to be fine. Does anyone have any suggestions to what is wrong or how to fix it?