20 Most Recent Samsung SyncMaster P2450H 24" Wide TFT Screen LCD Monitor Questions & Answers

there r plastic moulded locks..open with pryin with a knifed screw driver safely after unscrew all the screws

First you must find out if the monitor goes indeed to stand-by : disconnect it from the pc and start it, it should go to no source detected warning message then go in stand-by. Now look at the status light, if it's blinking then it's indeed in stand-by; if it's completely off then this signals a failure of the power board of the monitor - it's no longer capable of delivering the necessary current to the mainboard.
If the latter happens then the defect is hardware, you will have to take it to a tv repair shop and have it fixed.

If you mean by lack of contrast, that the screen illumination is low, then you probably have a faulty backlight, i.e. one or more of the cold cathode flourescent tubes is not working. Although this may be repairable, it may be more economical to buy a new monitor. Get a quote from a TV repair shop.

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First thing is try refitting / replacing the signal cable and connecting to another known working computer. Samir

Pull hard: http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=US&CttFileID=2355041&CDCttType=UM&ModelType=C&ModelName=LS24LRZKUV/ZA&VPath=UM/200910/20091008164533593/BN59-00906E-02Eng.pdf
Officially this is how its done. Put monitor face down and pull with the foot of the stand still attached. It will feel like you are breaking bones but stand and main monitor will be unharmed.
If your monitor is of a different type/model, try the other kind of Samsun stand system. Instructions here: http://ars.samsung.com/customer/usa/jsp/faqs/faqs_view_us.jsp?SITE_ID=1&PG_ID=0&AT_ID=29344&PROD_SUB_ID=0&PROD_ID=133

Your Lcd monitor i guessed is working. Try to check your system ram or memory and video card. You must discharge your electro static in your hand first before touching any of the computer components because it is sensitive to electro static, you must hold the computer casing for about 1 minute only. Then unplug the video card and memory and clean the pin using eraser to remove the dust and brush (small paintbrush) it also. Dust can cover the video and memory pin which will not be detected by your motherboard.

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Any glass cleaner that does have Ammonia, you can try daping the microfibre cloth with warm water first for cleaning.

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums http://en.wikipedia.org/wiki/Capacitor_plague

It sounds like you are in the Store Demo Mode. Turn it off and see if that fixes it. https://www.manualslib.com/manual/145519/Samsung-Syncmaster-Fx2490hd.html?page=27 Reset

Reset Samsung FX2490HD LS24F9DSM to factory state

monitorsfaq.com https://www.monitorsfaq.com > Factory reset > Samsung How to restore or reset Samsung FX2490HD LS24F9DSM. Reset to its factory state Samsung FX2490HD . How to hard reset monitor. Clear all settings or format. ..

The connecting cable or the video card would be the first suspects. Try a different cable to connect the monitor first, if there is no change, the video card in the computer would be second to look at. Can simply connect a different monitor to your computer to troubleshoot this. If the testing monitor works, it will be the graphics card that is the issue.

5 year old hyjacker, vinay. you forgot to say connected to what? is the screen only dim or dead.? even more important clue. RTM read page PDF 17, ? the OSD screen must work or the monitor is dead http://downloadcenter.samsung.com/content/UM/201205/20120517112305649/SA10-04Eng.PDF base pages https://www.samsung.com/us/support/owners/product/lcd-monitor-a10-series