coby LED 2326 will not turn on

[CR Designs]

Re: coby LED 2326 will not turn on

Good news is, neither can we. This board will use at least 4 layers meaning two hidden between the top and bottom. More likely it will be 6 layers making it even harder.

Thanks Tom66, What do you think?

[tom66]

Re: coby LED 2326 will not turn on

Check the power supply and see if those 3.3V and 5V are actually connected together so are all supposed to be 5V.

[selldoor]

Re: coby LED 2326 will not turn on

I am still concerned about the black glue - test it with meter on ohms 200k to see if is conductive. In the same place on the back of the board there is a black patch. If the board is burnt through some of the internal traces could be destroyed.

[CR Designs]

Re: coby LED 2326 will not turn on

Thanks Tom66, What do you think?

No, There's only 5v and 12v leaving the power board going to the main board. The 3.3v is on the another plug that goes to the on/off switch and that's the only voltage shown on that plug..

[CR Designs]

Re: coby LED 2326 will not turn on

I am still concerned about the black glue - test it with meter on ohms 200k to see if is conductive. In the same place on the back of the board there is a black patch. If the board is burnt through some of the internal traces could be destroyed.

Selldoor, It's not conductive. It's some type of glue dark brown color. I tried to remove it with Isopropyl alcohol 70%. It didn't work at all.

[selldoor]

Re: coby LED 2326 will not turn on

Ok but what is the mark on the back = os it the same - does the glue go right through as some sort of repair?.
Next time its together can you do an overall picture to show the layout of the boards.
and where the led cable connects to.

[CR Designs]

Re: coby LED 2326 will not turn on

Ok but what is the mark on the back = os it the same - does the glue go right through as some sort of repair?.
Next time its together can you do an overall picture to show the layout of the boards.
and where the led cable connects to.

I took some finger nail polish remover to it and that took it off. On the back looks like its coming where the heat sink is attached. I don't think it is going through. The spots do not line up exactly . On the front of the board looked like it was a drip. There were a few other spots on the board that had drips

[CR Designs]

Re: coby LED 2326 will not turn on

Ok but what is the mark on the back = os it the same - does the glue go right through as some sort of repair?.
Next time its together can you do an overall picture to show the layout of the boards.
and where the led cable connects to.

Selldoor, Here's the pictures you wanted of LED connection,it is circled in the picture. The other picture of the boards in place

[selldoor]

Re: coby LED 2326 will not turn on

Thanks
U3 3251 R64 11051 is a Bit 3251 - you should have spotted that its in the thread
where you posted about getting it open
Data sheet:
https://www.badcaps.net/forum/attach...9&d=1346785892
On ebay http://www.ebay.co.uk/itm/2PCS-BIT32...item3a7f0fe386

Next time its is possible can you test that link just above the socket where it says
lvds 5v. Looks like a ferrite bead or an inductor as it is L board designator just test for continuity ohms - should be nilish. Also when you can test the voltage on both sides
with respect to ground.

Perhaps PM nte hicks and ask what happened to his?

[CR Designs]

Re: coby LED 2326 will not turn on

Thanks
U3 3251 R64 11051 is a Bit 3251 - you should have spotted that its in the thread
where you posted about getting it open
Data sheet:
https://www.badcaps.net/forum/attach...9&d=1346785892
On ebay http://www.ebay.co.uk/itm/2PCS-BIT32...item3a7f0fe386

Next time its is possible can you test that link just above the socket where it says
lvds 5v. Looks like a ferrite bead or an inductor as it is L board designator just test for continuity ohms - should be nilish. Also when you can test the voltage on both sides
with respect to ground.

Perhaps PM nte hicks and ask what happened to his?

selldoor, here's the continuity test 1.001, voltage test had 7.3v one way and had 000.0v the other way.I tested this at R556 is that what you wanted tested? I PM nte he didn't get it fixed. He couldn't find a replacement board his board is burnt.

[selldoor]

Re: coby LED 2326 will not turn on

No sorry above and to the right may be L58 There are 3 labels lvds3.3v
lvds5v and lvds 12v Only the 5v is populated test each side with red probe
black probe on ground.


Bit odd each side of that resistor being 7v different that may be important.

[CR Designs]

Re: coby LED 2326 will not turn on

No sorry above and to the right may be L58 There are 3 labels lvds3.3v
lvds5v and lvds 12v Only the 5v is populated test each side with red probe
black probe on ground.


Bit odd each side of that resistor being 7v different that may be important.

I could not get a read on lvds5v the numbers just kept plusing higher never did stop

[selldoor]

Re: coby LED 2326 will not turn on

Hmm perhaps wasnt specific enough -power off - test across it for resistance.
Power on test for voltage with respect to ground screw.

[CR Designs]

Re: coby LED 2326 will not turn on

Hmm perhaps wasnt specific enough -power off - test across it for resistance.
Power on test for voltage with respect to ground screw.

Selldoor, I can't get a read on this resistance or volts. The numbers just keep pulsing higher or lower. but they never stop or hold on a set of numbers.

[selldoor]

Re: coby LED 2326 will not turn on

I am sorry, I understand what you say, but I dont know what that means. Perhaps it is a pulsed signal to tell something on the board the lvds is at 5 volts - perhaps budm or tom
will comment. We will just have to test something else.

[CR Designs]

Re: coby LED 2326 will not turn on

I am sorry, I understand what you say, but I dont know what that means. Perhaps it is a pulsed signal to tell something on the board the lvds is at 5 volts - perhaps budm or tom
will comment. We will just have to test something else.

When I try to read resistance or volts The number keep getting higher like
05.00 05.01, 06.26 , 06.89 It never stops climbing. It never stops on a set of numbers

[CR Designs]

Re: coby LED 2326 will not turn on

Selldoor, I tried another meter and got these readings meter set at 200ohms reading was 01.0 both ways. Set meter to DCvolts and got a reading of .001 both ways.