X93W lcd problem

[yves67]

Hello,
I am trying to repair an Hyundia LCD : X93W
When I turn on this screen, the picture is correct for two minutes, then a few blink and the picture disappear.
But with a closed light, I can see the picture
it is a problem with the backlight
I have ordered the capa kit on the lcdalternatives site, changed them but the problem is still there, I was quite sure about these capas ???
The only one, I have not changed, it is this one (100uF/450v) near the power supply, it was not in the kit
I am not an electronicien, and I don't know what to do next
I couldn't not find any information on this screen ?
I put the photos of the platine
If anybody has an idea, I will appreciate a lot

Thanks
Yves67

[selldoor]

Re: X93W lcd problem

Hi - what is the part number on the Inverter Transformers (black rectangular components with yellow stripe on side.)

[yves67]

Re: X93W lcd problem

thanks for your message
on these two transformers I can read :

SPW-099 Rohs
DARFON 2080N 811087_A

Thanks again
yves67

[selldoor]

Re: X93W lcd problem

Ok - Power OFF set your meter on ohms2000 and on the end with two pins
check the resistance on each transformer and post the results

[yves67]

Re: X93W lcd problem

On the side of the connection to the CCLF, pins 7 and 8
I found 484 ohms on one transfo and 473 on the other one
On the other side, pins 1 to 6, found zero between any pins ??

hope this help

[selldoor]

Re: X93W lcd problem

They look to be ok - we look for them to be within 3% of each other.

[selldoor]

Re: X93W lcd problem

Can you get a better picture of the bottom of the board and a picture of the top and bottom of the other (main) board

[yves67]

Re: X93W lcd problem

Hello
Here are the pictures

The part number of the other board is : 791261300600R

I hope these pictures are good enough

Thaks for your help

Yves67

[yves67]

Re: X93W lcd problem

I put another picture with 3000 pixels

[yves67]

Re: X93W lcd problem

Another one, a little bit better

[selldoor]

Re: X93W lcd problem

Do you have another monitor that you could try the ccfl bulbs in?

Do you have any spare ccfl bulbs or an old monitor or laptop even with a cracked screen?

[yves67]

Re: X93W lcd problem

I have one other lcd, which is working
but I don't have any spare ccfl bulbs
do you think it is the ccfl bulbs ?
at the start time, the four cclf bulbs are on and the picture is good
after two minutes, all the four cclf are off

[selldoor]

Re: X93W lcd problem

It could be the bulbs or the wiring.

Turn down the brightness on the monitor and see if it stays on longer.

If you type ILPI-068 into the "search" facility in the bar above you will see a few threads which might help. They use the same power board.

[yves67]

Re: X93W lcd problem

I have found on Ebay Canada the board ILPI-008
It is not expensive and I have ordered it
will see with the new board
I have read the posts about ILPI-068 but there is no solution...
I will post the result as soon as I got the new board
Thanks a lot

[selldoor]

Re: X93W lcd problem

I have found on Ebay Canada the board ILPI-008
It is not expensive and I have ordered it
will see with the new board
I have read the posts about ILPI-068 but there is no solution...
I will post the result as soon as I got the new board
Thanks a lot

I hope that is a spelling mistake otherwise you may have the wrong board?
Perhaps you should have tested the bulbs/wiring first

[budm]

Re: X93W lcd problem

Yes, it can be bad wiring on the lamp assemblies:
http://s807.photobucket.com/albums/y...klight%20lamp/

Test lamps:
http://s807.photobucket.com/albums/y...g%20old%20CFL/

[yves67]

Re: X93W lcd problem

yes it is a spelling mistake, I have oredered it using the part number

BTW I have found another hyndia LCD which is working and I will use it to test the lamps

I will keep you inform


thanks

[yves67]

Re: X93W lcd problem

Hello
I made some progress, I opened the other Hyndia LCD and connect the lamps to the other one, and it is working....
that means that the problem is in the lamps
may I connect one lamp from one screen and the other to the other one ?
are the lamps independant ?
Thanks

[selldoor]

Re: X93W lcd problem

Not absolutely sure what you mean.

You can disconnect one lamp at a time and connect one from the other machine, to try and find which is faulty.

[selldoor]

Re: X93W lcd problem

or you can set up the second machine and test one lamp at time from the z93w