Other problems, P.104, The dots do not change from flashing to always lit – Epson EB-440W User Manual
Page 104: No sound can be heard or the sound is faint, Problem solving

Flashing dots do not appear even if calibration is started
Check
Remedy
The computer screen is being redisplayed.
End all applications such as Flash animations that redisplay the screen and then restart Easy Interactive Function.
The dots are not displayed if the projector is not detected by the
computer.
Check that the projector and computer are connected correctly and then restart Easy Interactive Function.
The dots do not change from flashing to always lit.
Check
Remedy
The projector surface information cannot be received accurately
because there is another light source nearby.
Move the light source away from the projector or change the installation location of the projector.
The projector surface information cannot be received accurately if
the projector position is too close to the projection surface.
Check the installation position of the projector.
The dots change from flashing to always lit automatically
Check
Remedy
The Easy Interactive Pen has been disabled because the surrounding
light source state is unstable.
Change the installation position of the projector or turn off the light source.
Other problems
No sound can be heard or the sound is faint
Check
Remedy
Is the audio source connected correctly?
Disconnect the cable from the Audio port, and then reconnect the cable.
Is the volume adjusted to the minimum setting?
Adjust the volume so that sound can be heard. s
Is A/V Mute active?
Press the [A/V Mute] button on the remote control to cancel A/V Mute. s
Is the audio cable's specification "No resistance"?
When using a commercially available audio cable, make sure it is labeled "No resistance".
Problem Solving
104