20% tolerance power resistor. Could have been as high as 2.2K ohm. Was
the meter properly calibrated recently? If not, the assumption about it
being 2.5K could be wrong.

That tv is a Daewoo made elcheapo. The 2K resistor is a dropping resistor
for the standby power source circuitry. If the proper voltage is measured
on the zener diode with the tv safely plugged into an isolation transformer
for disassembled testing, there is no problem in that part of the circuit.

A bit more standard tv set troubleshooting is in order to narrow down the
problem.

David