32 inch astar 1080i lcd keeps having invalid input pop up which then leads to the tv switching to standard mode (channel 8 for example). Then I have the hd button to go back to whatever channel I was watching at the time. This problem occurs every 5-20mins and is also accompanied by the volume bar popping up right before the problem occurs.
I have the same problem in the office, but, not at home. I believe the IR sensor is confused by office florescent lighting, which has an unperseptible 60-cycle flicker not charactoristic of home incandescent lighting. Energy saving compact florescent probably have the same effect.
I have attached a dark tube over the sensor with relative success. This cluge is an unfortunate compensation for poor engineering because of the reduced angle of reception (the remote has to be directly in front of the sensor).
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Press and hold the Menu button for 8 seconds and a passcode screen will pop up. Enter 1105 and press enter. This will get you to the Installation menu. You can make adjustments to inputs and channels in the Public Display Settings portion of the Installation Menu.
It sounds as if the output resolution of your cable box is too high for the TV to accept.
If you are using HDMI, you might need to change the output of your cable box to a lower resolution (ie 1080p down to 720p)
To do this, connect a standard composite cable from your cable box to another input on the TV. Switch your TV over to that input and go through the display settings on your cable box. Lower the resolution, and then swap back over to your other cable.
If you are using HDMI, the source resolution could be too high. Your TV is only 720p so if your equipment is set for 1080p, it will not display. Connect the composite (yellow) video lead to the TV and change to that input. Use the equipment's menu function and verify the resolution. Make sure it is set for 720p. Also try a different HDMI cable, yours may have a bad lead inside.
If you get that across all inputs or channels then your digital board is bad. If you get it only on one input such as HD cable box, HD satelitte receiver or Blu_Ray player then they are set for the wrong output on that connector. The TV most likely will only accept up to 720p or 1080i....
This model TV has specs for DVI, VGA, component video and S-video inputs. Are you using a DVI-HDMI cable? In that case, check your cable specs. DVI-I and DVI-D (single link and dual link) are not interchangeable and I would guess you have the wrong one connected to the HDMI for your unit.
1 look for a remote stuck in a couch(or other near place) that is barely peaking out enough to change the channel.
2. Check that the channel up or down button is not stuck on the tv and or any remote that is set up for it.
3. Find the tv's infrared sensor and cover it with your hand or tape. If the channel changing stops then something is emitting infrared that is causing it to channel hop (occasionally security systems can cause this to happen) also some kids toys. Anything that emits infrared light basically.
once you have found the source (neighbor with the same brand tv for example) or a remote with the cushion pressing the button for you. then you will should be good.