Thanks for the suggestion. I did try powering it up directly off the wall circuit, and the onboard fuse near the mains input did blow rather spectacularly. I saw the optocouplers. I've tested the relay that crosses the two board sections out of circuit and most of the other psu components. They've all tested good.

I'm still looking for a service manual....

The hum wasn't coming from the degauss coil...it was coming from the main transformer. There's no fault and cleanly regulated power going all the way to its inputs when the transformer is out of circuit. ...

*sigh* No change with the degauss coil(s) unplugged. This monitor has two coils-an inner and and outer. I'm currently tracing my way through the power supply circuit...will post if I find anything....

Good point... in addition, when I re-attached the FBT and tested it, there were no more arcing sounds... just the initial degauss "fwumpf" sound before the onboard power supply fuse and my external power supply fuses both blew.

I'll remove the deguass coil, inspect it and test again, but it seems like you may be right on the money.

Props!...

This FBT looked pretty well intact, but I'll go over it more closely when I get home.

If you happen to have a matching FBT, you'd have my undying gratitude and some fresh cash in your PayPal account!...

As I mentioned, it is making high voltage crackling, arcing sounds coming from all parts of the monitor, but I'll definitely check the degauss relay.

Thanks

And according to this site, an equivalent FBT might be the HR46290.

[URL]https://www.hrdiemen.com/search/index?orig=&page=1574[/URL]
​https://And according to this site, ...URL]<br /> ​And according to this site, an equivalent FBT might be the HR46290.

[URL]https://www.hrdiemen.com/search/index?orig=&page=1574[/URL]
​

Photo......

[ATTACH=JSON]{"data-align":"none","data-size":"thumb","data-attachmentid":3240350}[/ATTACH]

I just saved this magnificent RGB input Eizo Flexscan TX-C7 MA-791 from the local e-waste...good news, the tube works and the board looks great...the bad news, it sounds like the flyback is shorted. (Turns on...perfect picture...systemic high voltage crackling heard while the picture flickers...then it blows the 5A fuse in my isolated A/C power supply.)

Anyone have any leads on possibly finding a replacement? (photo shows the flyback...