Dynex LCD TV DX-32E150A11 Won't turn on

[Tekone]

Hi, my friend gave me his TV because he couldn't get it to turn on, when the power cord is plugged in the red standby light comes on but wont turn on.
I took it apart to check for bad cap but didn't see any.
Can someone please help out with this I have attach some pictures of the power and main board.

[CapLeaker]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

turn on the tv and probe the PSon pin on the power supply.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

how do I do that and whats the pson

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

The TV doesn't turn on.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Okay with the power cord plugged in and the standby red light on from the PSon pin on the cn2 connector I'm not getting any voltage.

[CapLeaker]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Got a bad main board. It's not turning the power supply on. You can test this by forcing the power supply on without the main board.
Unhook all the main board cables from the power supply. Take two 1k ohm resistors and jumper 5V STBY to PSon, take the other resistor and jumper BLon (LCDon) to 5V. Plug in the power supply and all the voltage rails on the power supply should be up and running.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Thanks for your help. I don't have any resistors, is there another way to do the test?

[CapLeaker]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

I suppose you could, but also you run into a higher risk of damage. I don't condone it.

[nomoresonys]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

try unplug the mainboard from power supply, turn on tv, see if backlights come on, I believe they will IF it has pull up resistors.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Can I use one the standby 5v to jump LCD on

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

No did not turn on the backlight

[budm]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

You need the resistors to force on the PS0N, BLON, the resistors are for limiting current in case you slip or hook up to the wrong location, also in case the receiving pins do not have built-in current limiting resistors.
The resistor can be from 1K~500 Ohm.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Okay so I disconnect the main board and ps on to sb, lcdon to 5v on got the backlight to come on

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

I disconnect main board jump ps on to stand by 5v and jump lcd on to 5v got the backlight to come on.

What's next to try?

[budm]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

So you will need main board since you are able to force on the backlights.

[Tekone]

Re: Dynex LCD TV DX-32E150A11 Won't turn on

Okay thanks very much for your help