Samsung plasma pa51h4900

[hispeck]

This tv has no stdby light but when i press the power i can see the T-CON light blink, set is not on, what can i do?
Hispeck

[Hamie]

Re: Samsung plasma pa51h4900

Upload photos of the boards would be a start.

Check vs and va voltages (power supply)

Check vsc/vscan vch voltages on the y-sustain.

Check VE voltage on the X-main.

[hispeck]

Re: Samsung plasma pa51h4900

Here is the board for the samsung plasma, i also noticed the processor being hot
hispeck

[cliff_hootarski]

Re: Samsung plasma pa51h4900

Need photos of all the boards hooked up like you just had taken the back off the set.
Then clear close up shots of each board individually.

[hispeck]

Re: Samsung plasma pa51h4900

Here is the board for the plasma

[hispeck]

Re: Samsung plasma pa51h4900

another part of it, but i have a question you said i should check vs va and others, if those voltages are missing will it stop the standby light from lighting? because i checked there is stby 5v present from the power
Hispeck

[maxvalutech]

Re: Samsung plasma pa51h4900

When you press the power button on remote it triggers 5v standby to go to the main board and a return signal is then sent back to the power board (ps-on or rl-on or similar) telling it to turn on all the other voltages including Va Vs. Read through other posts on how to jumper stdby and ps-on so that main board is bypassed. If voltages then all come up the main board is suspect if they don't come up then powerboard is suspect but check again with y and x boards disconnected.
O

[hispeck]

Re: Samsung plasma pa51h4900

In this set the vs is 205v va 57v with some other voltage all are there which makes me believe the power is good, in my first post i used the word t-con, please sorry not t-con this set is plasma so i mean CTRL board, once i press the power i see the light in ctrl responding but still no stdby light, i have not checked any voltage in y or zsus board yet
Hispeck

[hispeck]

Re: Samsung plasma pa51h4900

I forgot the vs and va voltage come as soon as i plug the set to light even without pressing power so i don't know if is correct in that way
hispeck

[maxvalutech]

Re: Samsung plasma pa51h4900

What is the light on the logic (control) board doing while set powered up?

[hispeck]

Re: Samsung plasma pa51h4900

the moment i press the power i see the light blinking green
hispeck

[hispeck]

Re: Samsung plasma pa51h4900

I dont see any light all in the logic board, before it was feint but now nothing
Hispeck