The loud beeps are probably just the High Temperature Warning (Hijack Menu).
What does the high temperature sensor monitor?Is it just a general temperature of the inside of player or a specific component?
Could a chip or some other component(resistor,capacitor,diode) be overheating and causing this problem?
The other problems are definitely connector related.-ml
Do you mean the docking connector on the player or the connector to the motherboard or both or none?
The wires to both connectors appear in good condition,with no loose wires that I can see.