Question about Samsung SyncMaster 173S (Black) 17 in. Flat Panel LCD Monitor

2 Answers

Samsung 173S LCD monitor is dark

I have several of the Samsung 173S monitors. Power the unit up without the VGA cable and the backlights are burning ok. Plug in the VGA cable and the video is very dark. It is like it lost the Green or lumanance video. Sometimes the unit works normal. I am attempting to order a service manual. JStigler

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 20 times.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers
Re: Samsung 173S LCD monitor is dark

I had the same problem.
I opened the unit and checked all the caps- None were bloated or obviously in trouble. I checked the voltages on the two regulators on the green vga proccessor board. They should be 2.5 v out on the left on and 3.3 volts out on the right one and the input to the board is 5.1v from the main powersupply. The Power supply also supplies 12.4 v to the inverter for the backlight power.
These were all good.
I checked all these for reference for benifit of others. I expected the problem to be the video input/connector/opens related because without the cable connected the monitor functions thus the voltages should be good and the cpu/brains should also be OK.
Either the unit didn't detect the vga signal or was being forced into standby by some means.

After dissaembling the unit the monitor begain to function again, and then wouldn't after I reinstalled into the case agian.
I then found that the VGA board would work/not work with a slight flexing/warping of the board. The mounting screws and two clips bend the board when it is normally in place. I was able to listen closely to the vga proccessor board as I flexed it an could hear the pins on the Main Chip crackle. I looked very closely with a magnifing glass and could see that the pins on the side toward the VGA connector were loose- probably this batch of boards had a poor solder proccess and the connections were faulty.

I reflowed the solder on the main chip on the side toward the vga connector. Be VERY VERY careful these a extremely small pins. Have "good" solder wick available for the removal of blobs.

The Monitor now is again working and flexing the vga board no longer affects the operation of the unit

Good Luck.

Posted on Sep 14, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: Samsung 173S LCD monitor is dark

Is there suppose to be a pin missing on both ends of monitor cord? iam trying to get my samsung 173s to work

Posted on Jun 04, 2009

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I turn my monitor on and it lights up then goes blank.

Off ur pc, and remove the vga cable connected to the system unit. On the system unit without the cable, after it runs for sometime. Off it from the power button and fix the vga cable. Then cold boot your pc.

Jun 06, 2011 | HP w1907 LCD Monitor

1 Answer


LCD monitors have backlight (NEON / LED backlight), the screen will go dark if the backlight circuit / electronics or the backlight itself fails. Get it to a tech who will have spares for your LCD to get it replaced.

Mar 08, 2011 | Samsung T220HD LCD Monitor

1 Answer

Display or power issues with my 17'' LCD screen (SVA LCD #7500L )

Check the high voltage ballast transistor.. see if one of them is burnt... If none.. it could be overheating when supply with current. The ballast transformer supply high voltage for the backlight inverter..If these were overheating then the supply voltage for your monitor will be unstable.

Check also the backlight inverter (cold cathode light) if it is busted.. the function of this backlight inverter is to give display image on the screen.. If these were busted then what you will be seeing is black on your screen. You can also replace this.

Please rate this solution if this help you. thanks..

May 27, 2010 | SVA-USA VR 17S 17" Flat Panel LCD Monitor

1 Answer

Dark screen

Sounds to me as if the backlight on your LCD has burned out. Don't know if they sell the part you need without having to purchase a complete LCD screen. If you can get just the backlight by itself it will be whole lot cheaper.

Jan 08, 2010 | Acer AL1916W 19" LCD Monitor

1 Answer

Gateway FPD1530 Backlight turns on, but no display

has to do with power i can get myin to stay some times but then the same thing hapens to me u have to buy a new power board wich is esy to replace and i have had min as a second screen for like 4 or 5 years now with no probloms so its just from over use..

Jul 08, 2009 | Gateway FPD1530 15" Flat Panel LCD Monitor

1 Answer

Connected power but hardly see the image all dark

Sorry about your Monitor problems.
I have worked on several of these monitors and yours sounds like the BackLight has gone for a walk. ( NG ).
If you are experienced in the disassembly and the electronic component repair, let me know, and I will walk you thru the repair steps.

The backLight for your unit, can be ordered on EBay or direct from Samsung.

Jul 08, 2009 | Samsung SyncMaster 171S 17" Flat Panel LCD...

2 Answers

Samsung 913V LCD Monitor--No display when vga plug plugged in

1. please check by pressing num lock or caps lock key to verify that your machine is booting up, if yes then check the cable and if after changing the display cable it doesnt show up anything, it means you have a faulty unit

2. if numlock/caps lock key doesnt work, then your machine is not booting up, please check for loose ram etc.

Apr 04, 2009 | Samsung SyncMaster 913V 19" LCD Monitor

1 Answer

Monitor turns on then off quickly

From your description of the issue, the LCD and or hte inverter has failed. If less than a year old, contact Princeton Digital for warranty repair, if outside 1 year, it is likely cheaper to replace than repair

Jan 13, 2009 | Princeton Digital Computer Monitors

2 Answers

My samsung NW920 turns off after 1 min

If the blue LED ist blinking the monitor does not receive a video/sync signal. If the blue LED is on continuously and the display comes on for a few seconds and then goes dark or dim the backlight inverter may well be defective. The CCFL of the backlight needs several hundred volts to function.

Jan 11, 2009 | Samsung SyncMaster 920NW Monitor

2 Answers

Samsung 710V Comes on for a second then shuts down

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

Sep 02, 2008 | Samsung SyncMaster 214T 21.3" LCD Monitor

Not finding what you are looking for?
Samsung SyncMaster 173S (Black) 17 in. Flat Panel LCD Monitor Logo

Related Topics:

228 people viewed this question

Ask a Question

Usually answered in minutes!

Top Samsung Computer Monitors Experts

Rugeshan Lanka
Rugeshan Lanka

Level 1 Expert

15 Answers

Pieter Vleeshouwers

Level 3 Expert

1330 Answers

Lawrence Oravetz

Level 3 Expert

7235 Answers

Are you a Samsung Computer Monitor Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides