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Get rid of it.

Charles Hansen is talking about a different issue, the requirement that there be constant power consumption in any device that has a remote control ON/OFF function. A circuit in such a device has to be active to receive the "ON" command from the remote. The supply for this circuit may be a nasty little noise source that pollutes the audio system.

Old TVs are dangerous for a number of reasons. They attract dust to the high voltage parts inside, and this dust can conduct enough electricity to get hot and catch fire. They also have capacitors across the AC line. These are what are called X-rated capacitors, in that they are supposed to be self-healing after AC line spikes. A few of them are not quite self-healing and start house fires. I've seen an estimate that several fires each year in the USA are caused by these capacitors. The longer they are exposed to the AC line, the more likely they are to fail.

The leakage you found may be due to a failing part inside the TV, or simple coupling through parasitic capacitance or mutual induction from the circuits that are under power when the TV is in standby mode.

If replacing the old TV is not practical, then set up a means to disconnect it from the AC line when you are not using it. Your audio system will likely sound better.

If you replace it with one of the new LCD TVs, be aware that some of these use noisy switching supplies. A good RFI/EMI power filter will reduce the pollution from the switching supply, which is always on. I don't know if plasma TVs have similar problems.

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