It sounds like you tried diffrent outputs on the DVD player and nothing right?
Sounds like it died, electrons that have moving parts have short life spands, next time get a better brand & it should last longer. 4-5 years is the life spand of a 'good' DVD player now days.
I have an LG DVD Player (LDA-731) hooked to a SONY Grand WEGA Triple LCD Projection TV through an HDMI cable. Its been working flawlessly for 2 years - plays every thing.
I played an audio CD (like I have done many times before) and suddenly there is no picture - only a strong blue flicker on the TV. The audio through a different receiver - is perfect.
I did not change any setting. The S-Video output is producing no picture at all. I have checked and tightened the cable connections, etc. No effect.
What could be wrong?