Sounds like stray IR signals. Could be from any number of
sources.
You could try a "Factory Reset". From the manual:
Sometimes a factory reset is necessary in order to clear
problematic symptoms sometimes experienced in the
field.
A factory reset will clear all system settings, and all
presets. A factory reset will also clear any information
backed up onto the EEPROM that may have been
accomplished by a Memory Backup.
Simultaneously press and release the ON/STANDBY,
DOWN and LEVEL buttons. Once you see "Format
Filesys" on the front panel you can release the buttons.
A Factory Reset will erase the memory backup.
FACTORY RESET will take approximately 60 seconds to
execute
There is also a way to do an "IR LOCK". Since you're not
using the remote, I'd lock the IR sensor. The manual says
the procedure is under the Advanced Security Menu.
sources.
You could try a "Factory Reset". From the manual:
Sometimes a factory reset is necessary in order to clear
problematic symptoms sometimes experienced in the
field.
A factory reset will clear all system settings, and all
presets. A factory reset will also clear any information
backed up onto the EEPROM that may have been
accomplished by a Memory Backup.
Simultaneously press and release the ON/STANDBY,
DOWN and LEVEL buttons. Once you see "Format
Filesys" on the front panel you can release the buttons.
A Factory Reset will erase the memory backup.
FACTORY RESET will take approximately 60 seconds to
execute
There is also a way to do an "IR LOCK". Since you're not
using the remote, I'd lock the IR sensor. The manual says
the procedure is under the Advanced Security Menu.