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I have a Viewsonic 17, model 1782, Chassis series 17HV2, computer
monitor - made by Matsu****a 1994.
Was working fine - cut it off, transported to office - carefully!
Turned on - power LED came on for about 1 sec then faded off.
When it goes off, there is a sound like the degaussing coil
energizing. I pulled that connection and it does the same thing.

Seems like there is a load on one of the rails causing the whole
switcher to shut down. All caps (that I can see without removing the
main PCB) look OK - no buldging. Nothing smoking, smelling, or
burning.

I have a schematic for a 17G but I can't find the power LED on it.
Some connector designations match - like the degaussing coil
connector. So it is probably not exactly a 1782.

Any experience or how to troubleshoot hints??

thanks

bill


Bill,

Something to consider - unsupported refresh rates or resolutions can result
in the symptom described. Whenever changing out different spec monitors,
change the display to the most basic, VGA 640x480, before disconnecting the
old monitor.

FWIW, my old Viewsonic 17 failed on a number of different resolutions,
starting with the high refresh rates, over the course of two years, before
finally failing completely on any setting.

Scott
in Dunedin, FL