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Re: HDTV interfers with my Police scanner
It sounds like HD mode on the TV operates at a different frequency (refresh rate) that then causes interference to your nearby police scanner. There's not much you can do about this--the HDTV design cannot be modified.
Your best solution is to try moving the police scanner further away from the TV. I doubt there is any kind of barrier that you can place around the scanner that might block the interference (the "noise" given off by the TV is likely omnidirectional).
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This is the best video for the fix but, most non smart LCD HD TVs are the same. An old friend who was a retired police officer, had a CB Radio repair shop & he call the problem, "cold soldier joints" & CBs had PC boards w/ IC Chips, long before TVs did.
Line noise is feeding in from the AC line.
Use an AC liner filter to block the line noise.
RF (radio frequency) interference is being picked up by the power line or wiring.
Remove sources of RF interference, such as fluorescent lighting
or wireless devices not designed to work with audio/video equipment.
Wires between the components are on top of one of the components; the transformers are causing RF interference.
Be sure that wiring goes behind the components rather than on top or between components.
If there is an equalizer in use, there could be a ground loop.
Ground loops can be resolved by installing GLI's (ground loop isolators) on the cables connecting to the equalizer.
Ur tv have a dead board that call the LCD inverter board.This LCD inverter board it is a Long board.It only job are to provided a backlight to the tv LCD screen panel to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a long refurbish LCD inverter board for the replacement.
See if the minus volume button on the TV is stuck. With the TV off press the various buttons while keeping your ears close to them. Each will produce a distinct click when you press them, confirm if the volume - key also produces the same sound - if not the key is defective or stuck.
Your TV is probably getting interference from electrical appliances that produce electromagnetic interference. These includes fluorescent lights and electric motors such as water pumps. Cars, motorcycles and other things the emits electromagnetic signal can interfere with your TV. Check for any new electrical installations within 5 meter radius or any newly connected appliance on the branch circuit where your TV is plugged. Disable if there's any then operate the TV. If your TV is not mounted on the wall, try moving it to another location to check if this is the cause of the problem.
If your DVD player supports HDMI or OPTICAL / DIGITAL audio then I would take a look at swapping to those type of connection first. This would help eliminate bad cords / connectors / electrical interference from other sources
Your TV has two hdmi inputs and optical so you have a choice
I assume your Misubishi is not close to anything electrical. However, it sounds like you have had an interference for some time. This will ineviteably cause the HDTV LCD to collapse. LCD's don't respond well close to heat. Is there a vent close? LCD's do well in a properly vented area but with all this said.......they will pick up interference from anything electrical. A few questions to ask ones self........are there any wireless devices or chargers close to the LCD? Might there be an oven, a/c unit or other wiring with 220 volts anywhere close to the LCD such as in the wall?
The Mitsubishi LT is a very reliable, multi component ready set that allows great viewing with surround sound. However, stop and think about this interference. It is not something in the unit. It is an interference. Look hard and when you've discovered it.....you won't believe how crystal clear this set will be.
Let me know what you find...Thanks for using Fixya and add any comments that may help us help you.