32" Dynex DXL3210A Won't Power On

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

For that cap, I get 1.31V

Ok, thats just about right.

R624 (10k-ohm) and R629 (81-ohm) make up the feedback voltage divider.

Tieny, have you tried to shine a bright flashlight into the screen, to see if the pixels are lighting up? Im just wondering, maybe its not telling the backlight to turn on?

[tieny]

Re: 32" Dynex DXL3210A Won't Power On

For that cap, I get 1.31V

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

C648 is that the smd cap labeled, 470 10V VS? Measuring across the cap means red probe on positive and black probe on negative correct?

Yes and yes.

[tieny]

Re: 32" Dynex DXL3210A Won't Power On

Ill take a look at components V601 and V605 once i get home. I would try that time consuming method if i did have anothet board to work with.

C648 is that the smd cap labeled, 470 10V VS? Measuring across the cap means red probe on positive and black probe on negative correct?

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

Tieny:
Measure the voltage across capacitor 648 (470uf 16v) near the power connector.

[selldoor]

Re: 32" Dynex DXL3210A Won't Power On

Tieny- Couple of things - on the back of the board just above the connector it says C813 but whaterever is next to it looks a bit odd - what is it?
The other thing is are ther any part numbers on the very small ics V601 V605.
And another time consuming idea, if you have another board the same you could just work through them both checking every component for shorts or differences in resistance.(Well I did say it was time consuming)

[selldoor]

Re: 32" Dynex DXL3210A Won't Power On

I am wondering whether this model is the same

Mine is Dynex DX-L321-10A

The main Board looks much different

Yey, I have the same problem. Set appears to power on, led on front turns blue, I have 24V to inverter but, no BLon voltage at all

Hi Jon
You asked why no-one answered you? I think I have told you before that
we are all just volunteers so we have lives to lead outside badcaps and join in when we feel like it, if we know something that might help or if we think someone is about to do something dangerous. .
If you have read this post thoroughly you will know that having tried all the
usual stuff and some pretty unusual stuff we are really struggling to fix thisIt is not any easier because it is not a mainstream make.

You then come in and say you have the same problem???? so what would you expect us to say - "Sorry Jon we have no idea what might be wrong with your set."
As it happens you now say that you probably dont have the same set so anything we might have said would not apply- you could have compared the boards before you posted or you could have simply waited and watched the thread until a fix was found?

I suggest you start your own thread ( I recall suggesting that to you once before?)
Posting pictures of your boards - you will be able to do most of the tests
as per this post and state your results and part numbers then someone might take a bit of interest.

[electronicsurplus]

Re: 32" Dynex DXL3210A Won't Power On

I am wondering whether this model is the same

Mine is Dynex DX-L321-10A

The main Board looks much different

Yey, I have the same problem. Set appears to power on, led on front turns blue, I have 24V to inverter but, no BLon voltage at all

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

I wonder why I never receive any response whenever I post a question here? Am I disliked here or something?

I won't bother asking anymore if so


Thanks a bunch
Jon
Electronic Surplus

What?! no, sometimes people don't answer you right away...

[electronicsurplus]

Re: 32" Dynex DXL3210A Won't Power On

I wonder why I never receive any response whenever I post a question here? Am I disliked here or something?

I won't bother asking anymore if so


Thanks a bunch
Jon
Electronic Surplus

[electronicsurplus]

Re: 32" Dynex DXL3210A Won't Power On

I have the same problem, except, when the power button is pressed the light turns blue and, i have 24V to the Inverter, when I short 5v to BLon the screen lights but no video

Any ideas?
Please
Jon
Electronic surplus

[tieny]

Re: 32" Dynex DXL3210A Won't Power On

Heres the back of the area you asked for.

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

What about this one then?

http://www.alldatasheet.com/datashee...05DMI-12G.html

Think thats what Tom66 said it was some posts back

Ahhh, foiled again!

[selldoor]

Re: 32" Dynex DXL3210A Won't Power On

What about this one then?

http://www.alldatasheet.com/datashee...05DMI-12G.html

Think thats what Tom66 said it was some posts back

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

Heres the other two chips,

Can you please take a picture of the back of this area?

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

Heres the other two chips,

The first one is a MP1410es.

The second one is a Renesas R2A15112 audio amplifier chip.

I was wrong about the maxim chip, im not sure what model that one is.

[tieny]

Re: 32" Dynex DXL3210A Won't Power On

Heres the other two chips,

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

I can barely make it out, it reads: (the one i suggested to chalk)

12G
25L3205DM2I
2Y305600
TAIWAN
a083536

Its a MAX120 ADC chip, the 120 is right next to the big MAX text.

EDIT: Bah, it is the wrong chip, nevermind..

[tieny]

Re: 32" Dynex DXL3210A Won't Power On

I can barely make it out, it reads: (the one i suggested to chalk)

12G
25L3205DM2I
2Y305600
TAIWAN
a083536

[ben7]

Re: 32" Dynex DXL3210A Won't Power On

Tieny, you said you found 6 voltage regulators on the board back in post 38.

I see two more chips that I think could be voltage regulators.

They are both near inductors and capacitors, so I'm guessing they are buck-regulators.

What are their chip numbers?