Alex W. Jackson wrote:
Recently, my 1084S monitor which has served me faithfully for some
time quit abruptly while I was using it.

A high pitched whine from a switching mode power supply usually means
overload or short circuit somewhere, usually shorted horizontal output
transistor.

Here you go. Have fun!
http://www.devili.iki.fi/Computers/C...4S/schematics/