Optoma H30 Service Manual page 18

3-2.4 D. Remote Control Troubleshooting
3-2.5 E. Cable Troubleshooting
Start
Replace
the battery
No
Change Remote
Controller
No
Change Keypad
No
Change M/B
Start
Connect PC & loop-
through signal, then
power on the projector
Yes
Is loop-through
image OK ?
Yes
End
3-6
Yes
Yes
Yes
Yes
End
No
Change VGA
or DVI cable
H30