Question about Samsung SyncMaster 712N 17" Flat Panel LCD Monitor

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Monitor display suddenly bad

Never had problems with monotor, Suddenly last night I have horizontal lines of various widths and shades of gray over the whole screen. The quality of the display is also bad, colors are not true, overly bright and lettering is fuzzy.

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  • 7 Answers

Monitor has just died.

Posted on Aug 28, 2008

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1 Answer

My computer's all windows screen has suddenly shrunk today with a black border in right and left side. Now how can I get ride of this problem and make my windows screen normal again?


It's probably the monitor either was adjusted or is having a problem.

Use the buttons on the monitor to adjust the horizontal width on the screen...This should stretch your windows display across the screen if you adjust properly. Most monitors also have an auto adjust option...you can try that too.

I can't tell you exactly what the menu options are, because I don't know the buttons on your monitor. but if you find the menu, you should be able to make the adjustment.

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Hello !

Since an external monitor works, it is the display's backlight or inverter board.

If you were experiencing discoloration in the screen (pinkish lower light hues) before it failed, that would indicate a CCFL backlight issue. If the screen suddenly went dim on you rather than a slow degradation the inverter would be indicated.

Here is the disassembly guide:

http://www.irisvista.com/tech/laptops/ToshibaM35X/satM35X_1.htm

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try a good slap most times it works

u may have to try looking at options to change the monitor soon too, its a sign to say the monitors's getting old

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Screen displaying a thin white very bright horizontal line.... plz help


problem in vertical section.

1. Solder the vertical ic

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Hi,

Appreciate the "Ask Me".

I am assuming that you have more than just familiarity with electronic components and circuitry, the use of a DVM and a soldering iron. Further, that you have access to a service manual.

Width problem is basically insufficient horizontal deflection, then analysis would have to be in the horizontal section. Areas to initially focus on:
  1. 12V line and pin 29 of IC401;
  2. 110 V peak to peak at collector of Q403, if yes check Q 402 & 404 as well as T401;
  3. other components that affect the horizontal size are:
  • IC201
  • Q 405, 406, 407 & 408;
  • D409
  • L401
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

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Screen displaying a thin white very bright horizontal line.... plz help


Remove dry solder at Vertical IC if problem not solves replace VERTICAL IC and pf104

Darshan

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Does this unit have an external power supply (wall wart)? If so, substitute a known good one of similar specs. If the original is 12 Volts/1.2 Amps, find a 12-15 Volt/1.2 or greater Amp. DO NOT go over the voltage more than about 15-20%. DO NOT go under the current rating less than 90% for just long enough to see if it works. Be sure the connector fits PERFECTLY!!! Some will appear to fit but will be loose. Do not under any conditions replace a DC supply with an AC one or vice-versa.

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