Dead 1084S monitor
 

Recently, my 1084S monitor which has served me faithfully for some time
quit abruptly while I was using it. The picture and sound are now
completely defunct, and the monitor makes a high-pitched whining sound
when the power is turned on. Can anyone suggest what part of the
monitor may have failed, and is it likely to be repairable?

Commodore 1084s ?

"Alex W. Jackson" wrote in message
oups.com...
| Recently, my 1084S monitor which has served me faithfully for some time
| quit abruptly while I was using it. The picture and sound are now
| completely defunct, and the monitor makes a high-pitched whining sound
| when the power is turned on. Can anyone suggest what part of the
| monitor may have failed, and is it likely to be repairable?
|

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/

"Alex W. Jackson" ha scritto nel messaggio
oups.com...
Recently, my 1084S monitor which has served me faithfully for some time
quit abruptly while I was using it. The picture and sound are now
completely defunct, and the monitor makes a high-pitched whining sound
when the power is turned on. Can anyone suggest what part of the
monitor may have failed, and is it likely to be repairable?

Yes, the AT2079 EHT Transformer is faulty. Replace it and test HOT !

I.