Rca 32inch l32wd22 no power up no inverter light.

[snake91876]

I have no power up and inverter board not lighting. TV has power through wires going to main board I have correct voltages. I don't have the 24 v on the plug going from PS to inverter board. Any ideas.

[budm]

Re: Rca 32inch l32wd22 no power up no inverter light.

You need to verify if the inverter board is getting the bl_on signal (>3vdc).
Read basic troubleshooting guide at the link below.
Upload good clear pictures of the board using attachment function.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

Cant get the troublshooting guide open,
I have no voltage on the b on plug on the main board and
no voltge coming from ps to inverter board

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

Do you have 5V, 12V, PSON? Pictures of chassis?

[budm]

Re: Rca 32inch l32wd22 no power up no inverter light.

Hard to help without seeing the pictures of what we are trying to fix.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

Here is pic of ps and main board my pwer supwply has voltage on the left hand plug going to motherboard but none on plug going to inverter think it sau
ys 24v. what do u think.

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

You think you saw 24V? Go back and check for sure. We do not want to follow a wild goose...

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

No i have no voltage on plug going to inverter i think it saya one wire should be 24v. also i get no click or anything when it turns on but i have three wires with voltge on left plug of powersupply.

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

Do you have 5V standby power?

[budm]

Re: Rca 32inch l32wd22 no power up no inverter light.

If you check the voltage at the two pins of the large black filter caps (rated at 450VDC) when TV is plugged in but not turn on, it should have about 160VDC on the legs, when you turn on the TV, the voltage should go up to around 380VDC, if it does then the PS_ON signal is good. Br careful since you are working in the HOT side of the circuits, do not touch any part of that section with your hands.
Please make sure your pictures are in focus, it is hard to troubleshoot the boards with bad pictures.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

On left side power supply plug i have 14.8., 12v, and 5v

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

So you have 15V, 12V, 5V, but no 24V? That does not sound right at all... Unless that main transformer is for 24V and nothing else, that's possible I suppose.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

Yeah there are two big plugs on power supply and the one on left which runs to main board i have 15, 12, and 5 volts. the plug on right is the one to inverter board and it has 0 voltage on all pins.

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

Can we see a pic of bottom of the PSU?
Also do Budm's suggested check of the big cap voltage.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

Both big caps have 165v with meter on 400dcv. i am uploading additional pictures now.

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

This suggests PSON is not changing or there is a fault with the control portion of the PSU.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

what would be the control portion

[tom66]

Re: Rca 32inch l32wd22 no power up no inverter light.

Don't know yet, things like optocouplers for passing the signal across, to be honest, quite rare compared to PSON/main board fault.

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

Here is better pics of bottom of PS and pictures of the top .

[snake91876]

Re: Rca 32inch l32wd22 no power up no inverter light.

All right i have double checked i got 5, 12, 14.9 v on power supply, i got
5v standby , 12v, at main board, but when i press the power on i hear nothing and the voltage on the plug to invertor board is non existent. Could i have a main board problem instead of power supply issue.