Question about Samsung SyncMaster 214T 21.3" LCD Monitor

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Samsung 710V Comes on for a second then shuts down

I replaced all bad caps so suspect back light. Is there any wat to test them? Ohms, Scope, external power source??

Thanks, George

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  • twteasley Jan 12, 2009

    We are having the same problem. It started out with the screen coming on dim and flickering and is now to the point where it refuses to come on even if I turn it on & off several times (with a 10-30 sec. pause) and then after being left alone for and hour or so suddenly comes on like nothing ever happened. Must be gremlins!!!!!!!!!!

  • Anonymous Jan 27, 2009


    seem i had same problem with 5 display (214T 21.3"), did enyone know solution for this issue or is this quality proplem of Samsung

    BR miika

  • Anonymous Apr 14, 2009

    I have the exact same problem!

  • Nerijus Mazuolis May 11, 2010

    its the microchips NT68F63L on vga board. you need to open monitor to solve the problem. there are more than 3 ways how to repair. Can you open the monitor?
    if you want there is manual how to repair samsung monitors with this problem you can find on ebay: Repair manual Samsung monitor 710n, 913v, 510n and more, Item number: 220389041052.
    it shows step by step reparation process.


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I am a technician-informatic. I have repaired about 80 Lcd Samsung monitors with theese problems. I offer the repair manual.
Manual has been done with the experience of the repairing Samsung Lcd monitors. Manual was made by me and shows how to open monitor, how
to solve dark screen problem, how to check and replace capacitors, how to solve the problem non-optimal mode (without reprogramming MCU or
changing the main board) photo are included. 100% functional. The repair process is very simple 30-40min. (does not need a lot of
experience in electronics and expensive instruments) and is not expensive. With this manual you can solve problems by yourself and save

"Not Optimum Mode 1280x1024 60Hz"
- The monitor turns on but turns off by itself, the LED blinks green.
- If you detach from the PC points to "control cable" the picture runs continuously in the vertical direction or presents while line , and
as soon as it is reconnected, the monitor goes off.
- The monitor does not turns on and dont dispaly anything, the LED blinks green-lit, if you detach from pc points to "control cable".
- The monitor turns on, works well some time, but after a window apiers "Not optimum mode. Mode recommended 1280X1024 60Hz"
- The monitor turns on, works well only with low resolution 800x600, when try to change a window that reads "Not optimum mode. Mode
recommended 1280X1024 60Hz"

the manual you can find on ebay (my ebay name is asnerejas123):
Samsung monitor repair manual guide 710n,913v,510n more
Riparazione - repair Lcd Samsung monitor 710n,913v,510n
Reparaturhandbuch für Samsung 710n,913v,510n und andere

Posted on Oct 27, 2009

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The fault is the backlight, Samsung has designed it as when one of the baklights are faulty the unit shuts down.

Posted on Sep 07, 2009

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2 Answers

I have a samsung syncmaster 204bw and sometimes the monitor flashes black for a couple seconds and then comes back on. it will do it and then wont for awhile.

This is an early warning that the inverter board is failing, "powers the back lights behind the screen" eventually it will go. The board must be replaced or repaired.

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The screen will work for a while then when the screen saver comes on it goes blank and wont work till you turn it off and restart after some hours,sometimes even over night

Check the DC filter caps in the power supply first.
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses, poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

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Image on the screen appears only for 1 second; the green led remains ON. I suspect protection circuit of inverter bd. I can't find the related schematics.

I would look inside first for bad caps, then the inverter section, worst case will be bad lamps, see example of failed monitors due to bad caps:
The inverter board will go into shut down mode if it detects current overload (bad inverter transformers, or transistors), open lamps circuit (lamp does not stay light up (conduct) after first firing of the lamp), lamps draw too much current.

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For anyone having this problem i suggest to get a manual from asnerejas. His notes helped me out totally.
Its not something you would spot looking at its inside...

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does your monitor have an external transformer as the psu ?
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