Samsung SyncMaster T240 - 2 seconds then black problem

[selldoor]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Hmm - we still like pictures.
Here is a link to some detail for your transformer.
http://lcdparts.net/TransformerDetai...ProductID=3696
No Power to the board, set your meter to ohms 2000 and test S1 to S2 and S3 to S4. and post results.

[willi3007]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Hmm - we still like pictures.
Here is a link to some detail for your transformer.
http://lcdparts.net/TransformerDetai...ProductID=3696
No Power to the board, set your meter to ohms 2000 and test S1 to S2 and S3 to S4. and post results.

thank you very much for your further assistance.
Here are now some pictures from the main board .

I have measured the resistance of the secondary inverter coils:
That one nearer to the AC plug has 880 Ohm, the other one 930 Ohm (the inverter still on board).

How to check the CCFLs lamps?
How do you get access to the CCFLs in a proper way???

Is it possible to check the inverter board by using other CCFLs from a different brand display?


Again thank you for your assistance!

Willi3007

[selldoor]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

thank you very much for your further assistance.
Here are now some pictures from the main board .

Pictures are not really clear enough for trouble shooting ( probably not enough natural light)

I have measured the resistance of the secondary inverter coils:
That one nearer to the AC plug has 880 Ohm, the other one 930 Ohm (the inverter still on board).

That looks to be your problem- they should be within 3% .I usually end up buying from ebay China - takes a long time but a lot cheaper.
FIRST desolder the transformer and test again off the board..

How to check the CCFLs lamps?

You can buy ccfl lamp testers - see the lcdparts.net or if you have a working monitor of a similar size you can do some tests by just changing the leads.

How do you get access to the CCFLs in a proper way???

I dont know - all monitors are slightly different - try youtube

Is it possible to check the inverter board by using other CCFLs from a different brand display?

Yes same as above - should be similar size ie 15 inch and 24 inch not good
19 inch and 24 inch - ok for a 5 minute test. 22 inch and 24 inch should be fine. You do not need to remove the bulbs - just change the leads to substitute bulbs one at a time to see if they stay lit.

I use an old laptop panel - smashed but lights are ok.

[willi3007]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

thank you for your post.
It will take some days until I can effort the time for mor experiments.
Kind regards and all the best for a healthy 2015
willi3007

[Vil11111]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Good afternoon. I have a monitor Samsung T240 with power supply JP-54155A, REV 1,0 from 2008.03.17
Burned:
Q101-7N65C
R103 - 0.37 Ohm
D103
R19 - 10кОм, face value found in the photos of the forum
IC101 - I do not know which one.
Tell me where to download the scheme or the name of the chip.
Attaching photo. Thank you very much in advance. Attaching photo.

[Vil11111]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Found
https://cdn.badcaps-static.com/pdfs/...c8dc5a9678.pdf

[KrypteX]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Hi guys, I'm new to the forum (been lurking for a while). Hope this finds you well.

So I have a Samsung T240 with a TM-10160 / NY0902BCT inverter transformer exhibiting the "2 seconds to black" issue. I just measured secondaries S1&S2 at 870 Ohms and S3&S4 at 590 kOhms (yes, that's KiloOhms).
I guess I should order a new transformer, do you guys have any idea where I could get a proper one? Does the code written on the 2nd line (NY0902BCT) matter? I have found a few online with that code having different values.

Many thanks!

[KrypteX]

Re: Samsung SyncMaster T240 - 2 seconds then black problem

Is this forum thread completely dead? Not even a welcome message, from anyone? Weird...