Viewsonic VX2255WMB-2 monitor. Will come on for a few seconds and then go blank -- tried replacing the two main boards but still does same thing -- any suggestions? Thanks
Try shining a torch onto the screen with the PC booted (or another video-source connected), if you see a dim picture in the light, then it's possibly the backlight inverter has died (there's 4 CCFL backlights, if 1 died then t'others should still show a picture)
Otherwise, you can get the .PDF service-manual from here 'Viewsonic manual', chapter 6 has a diagnostic-flowchart that should help narrow down the cause :smile:
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