2. Red light can't start (Red light, remote control no reflect, no picture display)
YES NO
YES NO
YES NO
YES NO
YES NO
Check 5V SB voltage for abnormity
If the 5V SB voltage in normal, press the remote
control to check whether the control voltage of the
standb
control triode of the main board is chan
ed
If the 5VSB voltage with load is no or lower,
please check the 5VSB related circuit）
The control pin of the standby control
triode is changed without output
If the voltage no change, check software
programming is ok or not, or replace main chip
Change 12V or 24V control CMOS
tube (2345 or 2325 or 3401)
Check the output of 12V or 24V CMOS tube,
and check 12V to 5V is in normal or not
If 12V to 5V is not in normal, check load
without short-circuit, and replace 5V
transform IC
Check the voltage of 5V 12V power is in normal or
not, and related transform to 1.5V or 1.8V or 3.3V in
If all the voltage of mainboard are in normal,
check the software programming is ok or not,
and check the related circuit or change main
chi
If DC voltage is no or lower, check output
voltage with short-circuit or the grounding
resistance is lower, check the IC of main
chip may be bad and need replace
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