Proscan 40LC45Q

[BourbonPete]

Ok, here goes... I aqquired a "Proscan 40LC45Q" which doesn't work. When I plug the power cord in, a little blue light on the front comes on?
My question is, Is this supposed to be on when the TV is plugged in or is it the main power light to indicate that the TV is in operating mode?
The reason I ask, the power buttons have no effect, the screen is black, no other lights come on when I press the power button, the little blue light does nothing?
After reading "Umpteen" posts on this particular model, all indications pointed to a failed power supply board?
So, I replaced the board with a "guaranteed" used one, Still doesn't work, same as before, "as soon as I plug it in, the little blue lite comes on"?
I unplugged the button board from the main board to eliminate the possibility of the power button being stuck, "even tho, it definatly clicks when I press it."
Does anyone know if the light is supposed to change color when the power button is pressed or is it even supposed to be on when plugged in??
Inspecting the main board, I can see no visible damage or indications of blown caps and after wasting $$ on a used power board, I'm hesitant on wasting any more $$'s on a main board?!
I appreciate any insight anyone can give me....Thanks in advance..

[tom66]

Re: Proscan 40LC45Q

The best way to be sure about the blue light is to read the user manual. A lot of TVs I have repaired keep the light on when in standby, and turn it off when switched on.

[BourbonPete]

Re: Proscan 40LC45Q

I downloaded the pdf manual but unless I missed it, there's no reference to the light in the document I have? I was really hoping someone on here either has this model or had one, that could tell me if the light is supposed to come on when the power cord is plugged in? From what I gather, Lights on some models turn red or green when power button is pressed, other models, the blue light comes on when the power button is pressed? Hopefully someone will chime in on this?

[Mr Bill]

Re: Proscan 40LC45Q

I have a 40LC45S model and the led is RED in standby and BLUE when it's on.

[BourbonPete]

Re: Proscan 40LC45Q

Appreciate the info. After reading the manual again, mine is supposed to be blue in standby & red when it's on? But, nothing happens when I press the power button??

[Shane711]

Re: Proscan 40LC45Q

Working on a Proscan 40LC45S and the power supply has failed. The power keeps spiking but will not stay on. Unplugged everything from board and there is no standby voltage. So I checked everything and nothing bad found. I started to pull caps and the 2,200 were reading about 1,900 so I changed them and a few others. Now I have all my voltages when I unplugged the inverter board but with the inverter board plugged in the power supply will not power up. Maybe there is still a bad cap on the PS or the inverter board is bad. There is one transformer reading low ohms, .366 and .666 so I am expecting that is bad but I also expect the PS board to still have a bad cap. Oh, and the light on the front stayed a steady red no matter what I did and that was before I changed the caps so I will have to do an update. I will check the six caps on the PS that I skipped over and see what happens after that. Also the TV turns on with sound if I leave the inverter board unplugged.

[budm]

Re: Proscan 40LC45Q

https://www.badcaps.net/forum/showth...663#post552663