ok, i have a little experience with this kind of remote nonsense, so here's some input...
first, to confirm your remote is transmitting properly, a simple test can be done if you happen to have a digital camera or digital camcorder... the sensors in most of these cameras can see the infrared output of a typical remote. if you point the remote at the camera and watch thru the LCD display, you'll see the thing light up and pulsate...
try comparing its output brightness with that of a known good working remote. if they look roughly the same, the remote itself is probably good.
second, shut down all of your other home entertainment equipment that is located nearby, and then try some remote testing with just your unit that's giving you trouble. if there is any improvement in range, it would indicate that one of your other devices is interfering somehow.
third, if you are using one of those ' net-command ' like features in your equipment, whereby one system uses a plug-in infrared emitter to control other devices, that system may be interfering with your unit that's having trouble.
fourth, any other items nearby that might utilize infrared light, such as motion sensors and the like, may be causing unintended interference. just like radio signals, infrared communications can be subject to infrared interfering devices.
in my experience, i own a mitsubishi LT-46249 television that happens to generate some wicked interference when it's first powered up. i traced the trouble to the backlight in the TV. either the backlight itself, or it's power supply, starts up noisy when it's cold. when this happens, the tv can't even see its own remote for up to 10 minutes, after which the noise dies down and the remote then works. the interference that happens affects several of my devices in various ways. some of my peripheral devices work fine, while others might work intermittently. still others refuse to function at all, even with their respective remotes 1 inch away from the IR receiver.
while i'm not really sure if i'm dealing with IR interference, or actual EMI getting into the IR receiver electronics, i do know that the backlight system from the television is the cause. the tv i have has a feature in it that allows one to shut the backlight off manually. if i shut the backlight off during the period of trouble, the interference disappears and all works peachy. as soon as i restore the backlight, the trouble comes back. also, the interference reduces in intensity as i reduce the backlight level.
so try to be wary of this kind of interference. it may just be that your particular unit having the trouble might be more susceptible to such interference.
Originally Posted by 234
There are few reason of remote control failure.
1) IR Receiving part broken
2) The location of receiving part shifted from proper position
3) Receiving part suffers lighting effect
4) Receiving part suffers other set electrical noize
5) Front lens just in front of receiving part suffers many scratch
6) Front lens just in front of receiving part is dirt
In case of 1), (2) or (5), Did you drop the unit on floor recently?
There is no way to solve, except send the unit to repair center.
In case of 3) or 4), Did you relocate the unit recently?
Could you attempt to relocate the unit for testing?
In case of 6), you can solve to wipe the lenz