９
2.
Perform failure analysis with the “Operation Instruction” used correctly:
No raster
If the power
supply cable is
connected
properly
Power supply
cable plug and
receptacle
If the input voltage and
frequency is consistent
with those of the unit
Ensure the correct
input of power
supply
If the unit is in standby
status (remote control
judgment)
Check if the currently
received video signals
are inputted correctly
Press POWER button
for startup
Check the
exogenous signal
sources
Judge if the unit is
in blue background
Switch it off
and wait for 2
minutes.
Restart and
see if it can be
restarted.
Remove the cover
and replace the
mainboard
Then OK. The
failure may be
poor contact.
