Have a insignia NS-32LCD in the shop starts fine but loses back light after 15-30 minutes. Looking at the 24 volt supply it starts out low under 23 volts as the set warms up the voltage drops to about 20 volts.The back light will come and go with no set pattern .the audio stays.
To me seems like some capacitor problem,I have substituted 3 1000uf but same problem. diconected 24 v line voltage stays low.Turn tv off back on you get the 22v and can see a stead drop.I know(think) it is pwr supply problem but cant pin point it.It is also heat related be cause with back on problem appears,without runs ok except the fact the 24v line low .cover power supply problem starts.uncovered tv runs but that 24v bugs me.
I appreciate any ideas/feedback thanx
To me seems like some capacitor problem,I have substituted 3 1000uf but same problem. diconected 24 v line voltage stays low.Turn tv off back on you get the 22v and can see a stead drop.I know(think) it is pwr supply problem but cant pin point it.It is also heat related be cause with back on problem appears,without runs ok except the fact the 24v line low .cover power supply problem starts.uncovered tv runs but that 24v bugs me.
I appreciate any ideas/feedback thanx