• Monitor Samsung 2494LW gaśnie po 3 sekundach

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#1 Monitor Samsung 2494LW gaśnie po 3 sekundach


by bazant82 10 March 2023, 14:50
Witam, próbuję naprawić monitor, który leżał zapomniany na serwisie.
Samsung 2494LW gaśnie po 3 sekundach.
Załączam zdjęcia i pomiary, proszę o pomoc przy naprawie.
Czy napięcia są poprawne ?
Przeprogramować bios ? tylko nie mam poprawnego wsadu

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Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by Google Adsense [BOT] 10 March 2023, 14:50

#2 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by matic 10 March 2023, 21:47
Hello!

Measure the resistance between the points A, B and between the points C, D.
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#3 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by bazant82 11 March 2023, 11:23
Przepraszam, że nie dołączyłem wszystkich zdjęć, załączam pomiary:

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#4 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by matic 11 March 2023, 11:41
matic wrote:Measure the resistance between the points A, B and between the points C, D.
Are both resistances exactly the same?

The marked solder joints seems suspicious to me. Check them.
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#5 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by bazant82 11 March 2023, 12:07
matic wrote:Czy obie rezystancje są dokładnie takie same?
- takie same i wynoszą 1kOhm pomiędzy A,B oraz C,D

Zaznaczone miejsca lutowania maja napięcie 0V

#6 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by matic 11 March 2023, 12:47
bazant82 wrote:Zaznaczone miejsca lutowania maja napięcie 0V
Who asked you about the voltages on this solder joints?
I said the solder joints themselves are suspicious. Re-solder them with a soldering iron.
And DO NOT measure the voltages on these points again - these are a high voltage points, where the voltage can be several kV and it's very easy to damage your meter this way.

#7 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by bazant82 11 March 2023, 13:04
Przelutowałem te punkty, rezystancja między punktami A,B oraz C,D nie zmieniła się.

#8 Re: Monitor Samsung 2494LW gaśnie po 3 sekundach


by matic 11 March 2023, 22:38
bazant82 wrote:Przelutowałem te punkty, rezystancja między punktami A,B oraz C,D nie zmieniła się.
That's obvious, but does the monitor still turn itself off?

If so, the backlight CCFL lamps inside the matrix may be faulty. For the test connect any other approximately equal size matrix with the same backlight connectors (also make sure that the thick cables are at the same pins as on your original matrix) to the power supply board and connect the video LVDS cable to your old (original) matrix. Check whether the monitor still turn itself off in this case.

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