Short answer is, yes it can be fixed. Sounds like something in the colour drive circuitry of a CRT, or possibly something in the power supply.
If this is a CRT type television, be warned, high residual voltages remain inside it even when unplugged from the power source. If you have no experience with CRT's, best to take it to a tech.
edit: Do you get this symptom when using all video sources ( internal dvd, cable, antenna)?
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