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Troubleshooting - 60-in-1 to CGA/VGA SuzoHapp VisionPro monitor loses picture
mtdukes:
--- Quote from: lilshawn on August 30, 2023, 06:49:26 pm ---hmm... it's possible that there is something wrong with the backlight circuit/board. it's a common place for capacitors to go bad and the monitor to kind of work, but cause it to go blank after some time (from seconds to minutes.)
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Is there any way to test for the bad capacitor? I'm not sure if it's worth trying to swap out the part or the whole monitor.
lilshawn:
open monitor...inspect capacitors. not much to it. if they are flat and clean... probably still good. if they are bloated and or crusty...they bad.
i would just go ahead and change the ones on the invertor anyway just as a due course.
pbj:
If you’re using a 14 pin cable, try a 15 pin.
lilshawn:
--- Quote ---On normal boot with the VisionPro monitor, all I see is a flash of this initialization message on the screen for a fraction of a second before it goes dead.
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makes me think an issue with the backlight inverter. typically the backlight invertors will sense a current problem (either due to bad voltages or a problem with the backlights themselves) and shut off after a short time of being active. typically this is blown out electrolytic caps on the board causing all kinds of noise and ripple in the power tripping the protection to kick in.
in fact, you can test if this is the problem if you use a powerful enough flashlight to shine light into the front face of the monitor, you'll find it is in fact displaying an image on the panel itself..... it's just got no lights on to shine through the panel to show it... it's the backlight invertor. if you see nothing at all or the diplay is flashing or acting erratic... it's likely the power supply for the LVDS decoder board. (but that's neither here nor there.)
https://na.suzohapp.com/products/monitors/10-411300010
not sure if this is the actual one you have....but this is a backlight inverter used in their vision pro 17 and 19" monitors, so it's probably the same or similar... it has 2 electrolytic caps on it that go bad.
swap 'em out
mtdukes:
--- Quote from: lilshawn on September 07, 2023, 11:56:08 am ---in fact, you can test if this is the problem if you use a powerful enough flashlight to shine light into the front face of the monitor, you'll find it is in fact displaying an image on the panel itself..... it's just got no lights on to shine through the panel to show it... it's the backlight invertor. if you see nothing at all or the diplay is flashing or acting erratic... it's likely the power supply for the LVDS decoder board. (but that's neither here nor there.)
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lilshawn, you are exactly right! I shined a light into the monitor and I see a solid image.
I checked a manual for the closest version of my monitor I could find, and it looks like it has a convertor board, and the part number on mine matches both the manual and the one available on the SuzoHapp site here.
Is that the same thing as the backlight inverter board?
Thanks for your help with this! Definitely feels like I'm getting closer to a fix.