LC65lE654u no power

[charlie555]

When first recived this tv I had a light blue standby light. Unplugged power removed left side ribbon cable to the t-con board and now no standby light showing. Reset everything back to where it was and checked voltages. Getting all led power 86v. As far as voltages to mainboard pins 1,2,3 19 volts4,5,6 ground pins 7,8 0 volts pin 9-ps on 0v pin 10 0 volts. Checked main board caps getting different readings with same cap values 220uf 25v

[nomoresonys]

Re: LC65lE654u no power

Test all pins on connector from mainboard to powerbard on powerboard side, all board connected. Test in standby/plugged in but off, then apply power report both conditions, example: pin 1 bl-on=0 volts standby and 3.3 powered on, report results for every pin.

[CapLeaker]

Re: LC65lE654u no power

There is no STBY voltage on this PSU. There is 19V going straight to the main board. So your problem has something to do with that main board. The lower voltages are all created on there. If you look, there are a bunch of buck converters. Check them all.

[charlie555]

Re: LC65lE654u no power

What are buck converters?

[nomoresonys]

Re: LC65lE654u no power

" pin 9-ps on 0v" Check this pin with tv powered on, if no voltage, looks like the mainboard is not sending ps-on signal.

[charlie555]

Re: LC65lE654u no power

Ok thanks will try when I get home

[charlie555]

Re: LC65lE654u no power

Could it be the caps giving different readings they are the same value should they not be giving similar readings?

[budm]

Re: LC65lE654u no power

Could it be the caps giving different readings they are the same value should they not be giving similar readings?

You cannot accurately check the cap's capacitance while the cap is still hooked to the circuit, there are other component that are connected to the cap so the reading will not be valid.

[charlie555]

Re: LC65lE654u no power

Thanks

[CapLeaker]

Re: LC65lE654u no power

What are buck converters?

There is 19V going into the main board. However there is no way that the main IC, ram, flash etc. run on that voltage. Some thing has to convert the 19V down to 5V, 3.3V etc. to run all these IC's (buck converters, LDO's, regulators). So it could be that the main IC is dead, because it doesn't get any voltage.

[charlie555]

Re: LC65lE654u no power

That makes sense, so I guess I have to order a board.

[charlie555]

Re: LC65lE654u no power

“9LE366502120395” Does anyone have a main board ? To a lc65le654u