How do I stop my Samsung monitor periodically going black for a few seconds?

SOURCE: 713N samsung monitor; No display

Necesito Manual de servicio, con todos planos y circuitos, defectología

SOURCE: my monitor 940n samsung syncmaster gone in black...

I have just had this same problem. The problem mostlikely is a blown fuse on the inverter board. Mine was blown on the board and also a Capacitor (470nF/25V) was bad beside the Fuse.

I replaced both and monitor is working now again. After install the picture was a little grainy with little artifacts. In another post i found that the Power Supply board needs to be cleaned for unwanted residue. After that picture was fine again.

BEWARE that you need a soldering iron and a steady hand to replace these parts. If you are unfamiliar with soldering at all have an expert take a look at this. The Power boards uses 220v so DO NOT connect it to the Power when opened.

Starworx

SOURCE: Cant detect 1600 x 900 on control panel - display

You need to install the driver for your samsung sync master 2033, so the the graphics will improve or updated.

SOURCE: i have Samsung SyncMaster 2233BW 22 inch LCD

nokerns, Internal ac to dc power supply problem might be cause of your "black screen of death" that plagues all brands of "cold-cathode-fluorescent-lamp" back-lit lcd monitors. If unit is covered by Samsung warranty, then contact Samsung and complain about "premature failure" of the unit's power supply and see if they will do a swapout for same model unit. As a side-note, you should also learn how to do the "black-screen-of-death" flashlight test that every owner of a ccfl backlit lcd monitor should know how to perform and understand the results of the test. Do some reading in the FIXYA profiles of "budmrtn" "buddymc" "12fixlouie" and other lcd monitor tech's here on fixya and also view some DIY repair video clips on YOUTUBE. You will truly be amazed to find out how prolific the BSOD problem is in the lcd monitor industry. Please let other know what you will do to solve your monitor's problem by doing a reply to this response. If this was of some use to you then please rate this response on fixya. Bye for now. 12fixlouie

SOURCE: i have a samsung 17''

The message says that the monitor doesn't receives signal - which is normal. Since the problem appears only after you plug in the cable in means that the problem is located there - something is wrong with your pc, most likely the video card has died.