High Frequency Sound from Monitor

[Maverick340]

My monitor (CRT) Samsnung SyncMaster 798mbplus is emitting a very high frequency sound. Its not very loud but little disturbing since its high frequency. What could be the problem? When i turn the monitor off it stops. If i turn it on back it sometimes stops/sometimes doesn't.

 

[MiNiMaL_sAnItY]

My old crt did this when set at 75hz. Try changing the refresh rate and report back.

 

[Maverick340]

running at 1280x1024 @ 60 hz ..

 

[Kiran.dks]

Are there any magnetic things around? Like Speakers which are poorly magnetic shielded....
One more possible reason is power supply wire. See that the wire is messed up with other wires. Electro magnetic effect can also cause buzz in most of electronic equipments. With monitor "ON" keep moving wires around and listen for buzz changes.

 

[paid]

The e-core transformer inside could be creating problem it need to be glued properly

 

[topgear]

My 15 inch old lg 500g is also emiting strange chit chit sound after 20-30 mins. Any clue ?

Mine old 15 inch lg 500g is also emiting strange chit chit sounds after 15-30 mins. Monitor is running @ 1024*7668 @ 60 Hz ( max supported ). Any clue ?

 

[alsiladka]

The same happens with my 21 inch Samsum TV. Highly Highly irritating! WIll try and move the wire and see.