Troubleshooting Table (Lc-60/70Sq10U/15U/17U,Tq15U,Uq17U) - Sharp LC-70EQ10U Service Manual

[4] TROUBLESHOOTING TABLE (LC-60/70SQ10U/15U/17U,TQ15U,UQ17U)

• LED Backlight does not turn on.
When main unit is replaced, does it start normally?
YES
Replace main unit.
When power supply unit is replaced, does it start normally?
YES
Replace power supply unit.
When main unit is replaced, does it start normally?
YES
Replace main unit.
When LCD control unit is replaced, does it start normally?
YES
Replace LCD control unit.
LC-60/70EQ10U,SQ10U/15U/17U,TQ15U,UQ17U
If it is not an error of power supply/LED driver,
It is start-up in the lamp error disregard mode.
Do you start?
YES
When LCD control unit is replaced, does it start normally?
YES
Replace LCD control unit.
When the parts in the panel can be replaced. →Replace all LED-bars in the panel module.
When the parts in the panel cannot be replaced. →Replace panel module.
If it is not an error of power supply/LED driver,
It is start-up in the lamp error disregard mode.
Do you start?
When the parts in the panel can be replaced. →Replace all LED-bars in the panel module.
When the parts in the panel cannot be replaced. →Replace panel module.
6 – 20
NO
NO
NO
NO
NO
NO