TCL 40S615-AU Help Required Please

[Johno2010]

Hi I'm Matthew trying to help a friend out with a tv that was damaged due to lighting now has no power or standby light fuses ok on ac side. I'm trying to find a schematic diagram for the board in the pictures it came out of a TCL 40s615-au any help would be much appreciated.

[nomoresonys]

Need good clear straight on pictures of each board and one of the whole back as to see how everything is connected, hopefully you have the whole tv, otherwise it's pretty hard to troubleshoot, checking usually always starts on the powerboard.

[Johno2010]

thanks for the reply much appreciated hope these pictures help. yes i do have the whole tv. looks like the power board n main board are 1 board n t-com n wifi and bluetooth plug into that board.

[прямо]

Check ALL diodes, especially the four AC to DC rectifiers next to the big blue electrolytic capacitors.

[Johno2010]

thanks for the reply these four read in pictures and open in reverse for all 4. im new to this so any help is kindly much a appreciated

[прямо]

Excellent! I see one more SMD diode on the HOT side, it's under the word PSU.

Fuse is ok right? It's that little black rectangle component next to AC IN connector. It should not be open circuit.

If fuse is ok, and the diodes are ok, next is to do some measurements with the board flipped over and connected to live main AC voltage.

The board has several test points that you can probe with your multimeter to make the troubleshooting somewhat easier.

[Johno2010]

thanks again for the help that ones measures as in pic i've tested the fuse and has continuity does that mean its ok thanks again

[прямо]

thanks again for the help that ones measures as in pic i've tested the fuse and has continuity does that mean its ok thanks again

Yup, it is.

Btw, please take some photos, especially close up of the ICs, so we can see the part numbers clearly. There should be one or maybe more under that black heatsink on the HOT side.

I also gotta ask, do you have an incandescent bulb current limiter? It's mandatory to have when working with power supplies because an honest mistake like a slipped probe that cause an immediate short circuit can make the power supply go bang, blowing up components and tripping the main breaker.

[lotas]

Do you even have 12V at the output of the power supply?