Insignia NS-42L550A11 No turning on

[Louis82]

Hello.

I have this Insignia TV model number NS-42L550A11 that doesn't turn on. The front led looks red which means off, I press the power button and it doesn't change to blue (which indicates on).

I ordered a new main board from Tri State module but Im still having same problem. If I jumped the PS-ON with 5V pin the backlight turns on, which makes me believe the power board is good.

Any help is appreciated. Did I get a defective main board from this "reliable" tv parts provider?

Thanks. Pictures attached

[Louis82]

Re: Insignia NS-42L550A11 No turning on

Pictures here

[budm]

Re: Insignia NS-42L550A11 No turning on

https://www.badcaps.net/forum/attach...0&d=1480354359
So what DCV do you have on those pins when TV is OFF and when the power switch is activated?

[cliff_hootarski]

Re: Insignia NS-42L550A11 No turning on

Measure the PS_ON pin voltage as you press the "ON" button to see if it varies.

[Louis82]

Re: Insignia NS-42L550A11 No turning on

Thanks guys for replying.
As soon as I plug in the power cord I get these voltages:
on/off: 0.13v
DIM: 0.16
12v: 12v
12v: 12v
GND: 0v
GND: 0V
GND: 0V
24v: 24V
24v: 24v
PS-ON: 2.3V
5v: 3V
5V: 3V

LEd in front shows red color.
When I press power button, nothing changes. PS-ON remains exactly the same. It doesn't fluctuates.

Now when I check voltages on power button itself, I get 2.9v and it drops to 0.9v when I press button.

[budm]

Re: Insignia NS-42L550A11 No turning on

The main board is not sending these two signals: the BL-ON (ON/OFF), DIMMING.

[Louis82]

Re: Insignia NS-42L550A11 No turning on

Thanks Budm. TSM Module not reliable as it used to be.