Blue haze on a Sony rear-projection TV can severely diminish the quality of your viewing experience. Television programming can become partially unwatchable depending on the extent of the blue saturation on your display, and depending on the source, this problem can intensify further over time. Dirty lenses, electronic interference and simple cable errors can all be behind the manifestation of the blue haze on your rear-projection TV, but you can troubleshoot and fix the issue regardless of your previous experience with Sony TVs.
Check the audio-video cable on the back of the Sony rear-projection TV and ensure it is not damaged. The cable cannot be visibly worn and the prongs on either end of the cable should not be bent or otherwise compromised. If the audio-video cable is damaged and not replaced, blue spotting and general saturation problems may occur on the display of your Sony rear-projection TV along with other possible detrimental display effects. Replace the cable immediately.
Remove any high-powered electronics from the immediate vicinity of the Sony rear-projection TV. These electronics can interfere with the normal operation of your Sony TV's display and cause colour blurring. Specific devices to look out for include computers and speakers, although any large or powerful electronic devices may be the culprits. If you do not relocate that equipment, the interference can steadily worsen and further degrade your rear-projection TV's display. Removing the equipment should cause the effect to dissipate, but this process will take time.
Turn off the TV and disconnect its power cord from the power source if the blue haze effect remains on the display.
Lay a towel on the floor where you are prepared to make repairs on your Sony rear-projection TV. Place the TV's screen carefully face down on the towel, leaving the rear of the TV exposed.
Remove all the screws on the back of the Sony TV with a Phillips screwdriver. Work around the loose base of the back cover to create separation from the rest of the TV and remove the cover altogether.
Examine the back of the TV. You will see a series of three lenses in a row near the top of the exposed assembly. Use a soft cloth dampened with soapy water to gently clean each of the lenses. Avoid using any particular solutions, as it is safest to stick with soap and water. Dry the lenses completely with a soft, dry cloth after the cleaning.
Set the back cover of the Sony TV into place once more. Reinsert all the cover's screws.