Sony VPL-DX10 Guide De Référence Rapide page 40

Symptom
?/1 key flashes in red.
(Repetition rate of 2
flashes)
?/1 key flashes in red.
(Repetition rate of 4
flashes)
?/1 key flashes in red.
(Repetition rate of 6
flashes)
20
GB
Troubleshooting
Cause and Remedy
• The internal temperature is unusually high.
c Check to see that nothing is blocking the ventilation holes.
• The projector is being used at a high altitude.
c Ensure that "High Altitude Mode" in the Setup menu is set to
"On."
The fan is broken.
c
Consult with qualified Sony personnel.
Unplug the AC power cord from the wall outlet after the ?/1 key
goes out, plug the power cord to the wall outlet, and then turn the
projector on again. If the ?/1 key flashes in red and the problem
persists, the electrical system has failed. Or the interior of the unit
reached a high temperature, and the temperature fuse has burned
out.
c
Consult with qualified Sony personnel.