tv wont turn on need help

[bloombloom88]

i have a 32 inch polaroid pro 3200 lcd tv that has been working flawlessly up until tonight.

i took a VGA cable, changed the tv input to computer/VGA setting which gave me the normal blue screen saying no signal, hooked the cable to the back of the tv and then into my laptop. the laptop screen changed but the tv stayed the same. i gave up on trying to connect the two at that point and i tried to change int input on the tv, and got no response. none of the buttons on the tv or remote did anything. i then pulled the power cord out of the back of the tv, plugged it back in and now it wont turn on. the red dot light a the bottom of the tv is not on either, does this mean the power supply fried?

i appreciate any input

 

[nukemaster]

Disconnect EVERYTHING(including power) from the TV over night then just connect the power the next morning and see if you get the standby light.

Also look to ensure the TV does not have an actual switch to shut off the power supply as some may have this as well. Also, it never hurts to see if it has a fuse, if it does, it will be near the power plug in the TV.

It would be some very bad luck to kill a TV while connecting a laptop to it.

 

[bloombloom88]

ill leave everything unplugged overnight. the fuse looks good, i dont see any switch for the power supply. what would leaving it unplugged overnight do?

 

[nukemaster]

Just to ensure all power is discharged.

If you have an electrical multimeter, you can set it to resistance(OHM or Ω) and check the fuse it self(outside of the tv clearly).

 

[bloombloom88]

left power unplugged last night with no change, the fuse is good. what could the problem be?

 

[nukemaster]

Well something has to have failed, but only a repair shop will be able to find out what.

Again, I find it hard to believe that just plugging in a monitor/tv did it, but anything is possible.

 

[bloombloom88]

are there any good places to find parts for this tv?

 

[nukemaster]

If you just need caps and stuff, Digikey and Mouser has all kinds of parts. You need to know what you want to get. and be able to install it.

http/www.digikey.com/
http/mouser.com/

I would like to remind you, that many things can break in a TV and sometimes it takes too many parts to get it going again.

Example. I found 3 bulging caps on a monitor and a blown fuse, well no problem, replace those and call it a day, WRONG, the caps had nothing to do with the fuse blowing so I would have to start checking all the parts in the inverter section of the screen.

Since shipping parts has a rather flat rate(up to a certain amount of parts), buying extra parts one at a time makes little sense.

In a pinch, if you have a RadioShack, they should have some parts as well. Just remember to get parts rated for the voltage they will see(going higher will not hurt. so using a 36 volt rated cap for 12 will not be an issue aside of it being bigger.).

 

[bloombloom88]

great advice, thank you for your help

 

[nukemaster]

I just don't want you to waste the time and fuses I did(on the plus side, I also ordered stuff for another project ) for something that may not be easy to repair. When you have the parts(or are 100% sure you can fix it), its another story.