SyncMaster 793DF 17" CRT Monitor: monitor makes high pitch noise...

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vvga connector
http://servicemanuals.pro/servicemanuals/samsung/service_manual/monitor/ctr/793df/details.html

service manual

the "flyback" is the VERY high voltage transformer that powers the CRT through a cable that plugs into the CRT inside the monitor case. Don't try unplugging, even with power off, as it has to be discharged to ground to remove risidual voltage, like a capasitor. This voltage is about 35,000 vdc.

A flyback transformer (FBT), also called a line output transformer (LOPT), is a special type of electrical transformer. It was initially designed to generate high voltage sawtooth signals at a relatively high frequency. In modern applications it is used extensively in switched-mode power supplies for both low (3V) and high voltage (over 10 kV) supplies.

this is use only on monitor the old one that used CRT TUBE.

Remove the monitor from power for more than 10 minutes and then put it on again, the automatic degaussing circuit that built in the monitor should resolve your problem but make sure the monitor is away from magnet or powerful speakers.

press menu button and hold it above 6sec

Hello, Would suggest you get a new one,since monitor are not that expensive, note that the monitor has a large capacitor which stores charge in high voltage,it will not be good for somebody without the required skills to open this monitor.It can lead to serious injury,better still if you cannot buy a new one,please give it to a technician to do it for you. Regards

For a copy of the user manual you can go to:

http://online.manualspace.com/computer-monitors-free-ebooks/samsung-monitor-service-manual/4207/samsung-syncmaster-793mb-793df-crt-monitor-service-manual-91.html

Scroll down this page and you will see a red link entitled "Download Samsung SyncMaster 793MB 793DF CRT Monitor Service Manual".

Right click on this link and select the menu option "Save Link As".

Save the file to your computer then you can simply use Winrar to extract the file.

Would you kindly rate my answer please if this has helped resolve the problem - thanks :)

try to wiggle the vga cable/dvi cable and see if the brown lines disapear, if not.there is a problem with the monitor

this is dry problem

Backlight/s on the way out.