baronbeehive
Headphoneus Supremus
Tiny splat or even a thread of heater wire over the wrong pin which can be highly probable IF the heater wiring was replaced or moved..
Resistors usually never short,
They only burn open open.
Check the socket pin solder connections on top board side for DEBREE between socket and board
Right I think I will have to desolder the socket to see underneath. At least we know that the problem must be between that 2k resistor and the pins somewhere.