KDS K-92BW Turns off

[retiredcaps]

Re: KDS K-92BW Turns off

It is time for a clear focused picture using manage attachments function. Please do not post pictures inline as they slow down the loading of pages.

For best picture quality and clarity take your boards to a window on a sunny day, turn flash off, and use macro mode. Take a top down view of all your boards (front and back). Make sure the photo is legible so that we can read the PCB printing clearly. A shutter speed of 1/125 or faster will produce nice clear focused pictures. Try to get a photo that is 2000x2000 resolution or as close as possible.

Here is an example of the pictures we want.

https://www.badcaps.net/forum/showpo...94&postcount=1

[slcomputer]

Re: KDS K-92BW Turns off

hi I have a problem with my lcd monitor when i turn it on it goes white for a few seconds and then goes black.
I have a 200-000-1700tlbmh board the caps look fine.
any help would be appreciated

[selldoor]

Re: KDS K-92BW Turns off

Read the post above yours and do as it says.

[slcomputer]

Re: KDS K-92BW Turns off

[QUOTE=slcomputer;300073]hi I have a problem with my lcd monitor when i turn it on it goes white for a few seconds and then goes black.
I have a 200-000-1700tlbmh board the caps look fine.
any help would be appreciated

[EGuevarae]

Re: KDS K-92BW Turns off

[QUOTE=slcomputer;300133]

hi I have a problem with my lcd monitor when i turn it on it goes white for a few seconds and then goes black.
I have a 200-000-1700tlbmh board the caps look fine.
any help would be appreciated

Green caps, third picture. Those need to be changed.

[slcomputer]

Re: KDS K-92BW Turns off

do you mean the the caps on the powerboard?

[budm]

Re: KDS K-92BW Turns off

You may have more than one problem, one is that your power supply has bad caps, another one is that your LCD panel T-CON may not be getting the voltage feeding from the main board or the T-CON itself may have problem. You need to at least replace the bad caps first, bad cap can look normal without having domed top.

[EGuevarae]

Re: KDS K-92BW Turns off

do you mean the the caps on the powerboard?

Yes. For a start. You can't really diagnose accurately with those caps in there.

[slcomputer]

Re: KDS K-92BW Turns off

where do i but the caps do you know?
how do i check the fuses? do i use my multimeter?

[slcomputer]

Re: KDS K-92BW Turns off

sorry I meant where do I buy the caps?

[slcomputer]

Re: KDS K-92BW Turns off

I have check the fuses with dmm and they both read 000 so im guessing they aren't blown. Is this correct?

[slcomputer]

Re: KDS K-92BW Turns off

can I check tha capacitors with a multi meter?

[selldoor]

Re: KDS K-92BW Turns off

Hi
1where do i but the caps do you know?

http://www.activecomponents.com/Page-Contact-Us_3.aspx
appear to sell good make caps

A lot of NZ members mention Jaycar?

Digikey

Mouser

RS direct.

2how do i check the fuses? do i use my multimeter?

Yes - as you have done - but was not required as it would not work as much as it does if the fuses were bad.

3 can I check the capacitors with a multi meter?

No, unless your meter has a capacittance test on it -
even then its not a good test.

I think you will need to change all the caps except the large one

BUT before you buy caps I want you to test the secondary resistance on the inverter transformers as the board looks
a bit browned I will post where you have to test soon.

[selldoor]

Re: KDS K-92BW Turns off

Right Power off meter on ohms 2000 measure S1 >S2 and S3 >S4
and post the results.

I have also marked in yellow two components Q5 Q6 What is the part Number on them and is the bottom one in your picture burnt or is it just the picture.

If you take more try not to use flash and more natural light.

[slcomputer]

Re: KDS K-92BW Turns off

which components are marked yellow please
how do i test s1>s2 and s3 >s4 are they on the board if so where?
The two rectangle like parts on the board say they are T1 at top and t2 at bottom does that help?

[slcomputer]

Re: KDS K-92BW Turns off

730-703-1900tlm-lh eel19-a01700 hl 7118 is written on the rectangle square components does that help Im not sure are these the transformers how where do i test these do I use a multimeter?

[slcomputer]

Re: KDS K-92BW Turns off

how do I test the secondary resistance on the inverter transformers

[selldoor]

Re: KDS K-92BW Turns off

Sorry - forgot to attach the picture

[slcomputer]

Re: KDS K-92BW Turns off

when I test s1 s2 s3 s4 they all come up with 000 the part number on the resistors in yellow is k3615

[slcomputer]

Re: KDS K-92BW Turns off

there seems to be some black by the T1 but I was told that is just because these get quite hot so its normal is that right?