Toshiba 42HL67US Back light issue

[CraigR]

Toshiba 42HL67US amber light when plugged in then hit the power button and light turns green and panel light flashes twice slowly then stays out. I have checked the voltages on the power board and there is no BL_ON it's just marked with the voltages next to the plug or ground. I do have the voltages marked and a couple maybe a volt higher. I also took a test bulb and went around and tested every inverter and they all lit the bulb the same. Also did a visual check for swollen caps or anything that might have got hot and nothing.Not sure now.

[CraigR]

Re: Toshiba 42HL67US Back light issue

Anybody??

[CraigR]

Re: Toshiba 42HL67US Back light issue

Could someone tell me how to test the inverter boards?

[budm]

Re: Toshiba 42HL67US Back light issue

So you do have 24VDC at all 6 fuses on the master inverter board but no BL_ON voltage?

[CraigR]

Re: Toshiba 42HL67US Back light issue

Yes 24v all 6 fuses on both sides. Nothing marked as BL_ON but I do have all the voltages as marked next to the plug.

[budm]

Re: Toshiba 42HL67US Back light issue

So that means the main board is the problem at this point. I do not have the service manual for this model.

[CraigR]

Re: Toshiba 42HL67US Back light issue

The problem turned out to be a bad inverter on the master board. Not a main board.