mulox -- What are the lights on the top of the HC5500 telling you? See the trouble-shooting pages in the manual. From your description, it sure sounds like a failed cable or video input.
What video input are you using? It could be a defective (failed?) cable. If you are using the component inputs, all it takes is one of the three cables bad to kill the video (the "Y" cable is the most critical).
If you are using the HDMI input, you may also have pulled the input connector loose from the circuit board. It doesn't take much of a downward pull on the connector to break the solder joints. You have 2 HDMI inputs, try the other one and see if it works. If it does, then you have a failed input connector.
What video input are you using? It could be a defective (failed?) cable. If you are using the component inputs, all it takes is one of the three cables bad to kill the video (the "Y" cable is the most critical).
If you are using the HDMI input, you may also have pulled the input connector loose from the circuit board. It doesn't take much of a downward pull on the connector to break the solder joints. You have 2 HDMI inputs, try the other one and see if it works. If it does, then you have a failed input connector.




















