Holy be-jeezuz... 218 posts later... Rifaa, You are a trooper.

HUH!!

 

it turns on. no sound. maroon color picture. dvd player not working. dvd player might be cause i hooked it up wrong but everything else is hooked up right

same things as last time when it did work!

 

Can you check for voltage again as in post 192
and can u show me full screen pic

 

full screen pic doesn't show red cause camera is too far away.

taking apart tv and checking voltage. be about ten minutes

 

here are the voltages

took longer than i thought

 

First thing is to check this regulator.
Give a nice top view closeup of the area marked by the triangle
and also the no. on it

 

triangle

jk. i know what you mean

will do that in morning. thanks

markings on top right component

AZ1084S
-3.3E1
709K14

 

Traingle Whoooops!!

Marking indicates a 3.3V regulator. And power is not coming to it.
Bad news.
Now, don't go and take out the components like tester2 did.
Wait till I say so.

So, we need to find why this regulator have no input.
Do you think you can trace it?

 

i know i read that. sucks.

trace it?

 

Yea. U need to find the input pin connection and where it leads.
This way you can figure out where the connection is broken or from where the regulator get it's input Vcc.

 

We need a positive voltage for this regulator. It should be coming from somewhere.
Where is what we need to know. Since you have the board you can take closer look and trace the tracks
This I will leave it to you, let's see what you are made of.
I am off to bed, it's been 36 Hrs without sleep.
See u tomorrow.
G night

 

ok. i will try either later on today or tomorrow. so by tracing. you mean go through the traces and find where the voltage stops?

meaning the defective component will have a voltage on one side but not the other.

i don't know anything about circuits besides all the googling. researching. physics II class and Lab I took which had a little bit of capacitance, resistance, current, and voltage calculation of series and parallel circuits. been about a year and half since i took that class so don't remember too much.

the problem i have is looking at a PCB and imagining a schematic of it. Like how to tell what is parallel and in series on a real board. Not just some drawing.

Happy Easter!

 

The Input should connect to the 12V through a component, there may be a MOSFFET switch in between.
I have to take closer look at that area. The picture you gave, some components are blocking the view, I need a direct view from the top. so the caps and inductors aren't blocking the PCB

 

checking right now

 

taking pictures now. ok the last pin on the PSU measures 0.12 DCV

now the input on that regulator is 0.041 DCV.

could it be that the last pin on PSU isn't at its correct voltage

first and second are the correct 12 DCV

 

I don't think last pin is used

 

in voltage regulator post http://forum.allaboutcircuits.com/showthread.php?t=36611 says capacitors can change the input voltage of voltage regulator. guy has same problem sort of

so could it be a shorted capacitor

 

set 1 is in previous post
set 2 pictures

cleaning fuse part right now. looks dirty

 

Take a look at the PIC

 

i am more confident in my soldering ability now. i don't put pressure on the pad and did fine on taking off the plastic part earlier.


those are the capacitors i was talking about. was doing in circuit tests with the resistance and capacitance which doesn't tell you anything cause they are in circuit. but usually the capacitance is correct when i probe them in circuit. but these didn't add up. i don't know. ignore this cause will probably just throw you off and might not be problem.


i will check the voltages again when i get home