warmech
Well-known member
After finally getting around to putting a cable together to test out my portrait display, I got it hooked up to my IIsi and... well, it sort of worked. And I stress "sort of." It's displaying an image, but the screen has this sort of pulsing effect, where the image will darken in a wave across the screen and then return to expected brightness as the wave passes. The brighter I make the image, the more reduced the effect; of course, with everything overdriven, the image is terribly blown out. I'm attaching a video for reference because I really don't know how to adequately describe what's going on. I'm used to working on much simpler displays (standard-res 15KHz monitors for arcade games) that have pretty well known and addressable concerns, but this kind of issue is entirely new to me. I've got the display broken down and have been looking over the boards with a fine tooth comb and, so far, nothing looks amiss. My first guess would be caps, as they're the most failure-prone components on any display of this age; they all look in decent shape, but that's no positive indicator. One thing I will say - there are a TON of caps; combined, all the boards have something like 60-ish electrolytic caps.
If anyone has any insight on where to start with this thing, I would be beyond grateful.
If anyone has any insight on where to start with this thing, I would be beyond grateful.