VOGONS


First post, by pan069

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I have this Dell P170S LCD monitor and it seems to have some issues. When it's cold (not used for a while) and I power it on, the first 5 or so minutes everything seems to be fine. But then suddenly, the colors invert. Very annoying. I also noticed that when the screen is a bright color, that I can actually observe the refresh, especially when I'm not looking straight at it but see the display from the corner of my eye.

Would an issue like this be fixable?

This is a photo of what it looks like, I'm running Dune 2 here:

4WuAV3k.jpg

Reply 1 of 9, by einr

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pan069 wrote:

When it's cold (not used for a while) and I power it on, the first 5 or so minutes everything seems to be fine.

Any time there are issues like this I'm thinking leaky/bad capacitors. Although your symptoms are a bit different than what I've experienced before, bad caps leading to intermittent errors on LCD displays is a very common fault and it's probably a good idea to open the monitor and do a visual inspection of the caps as a start.

Reply 2 of 9, by tegrady

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Have you tried hooking it up to another computer? It could be a bad video card.

Reply 3 of 9, by pan069

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tegrady wrote:

Have you tried hooking it up to another computer? It could be a bad video card.

My other monitors work fine on the same system. This display has the same behaviour hooked up to different cards. Definitly a problem with the display.

Reply 4 of 9, by pan069

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einr wrote:

Any time there are issues like this I'm thinking leaky/bad capacitors.

I'd like to check out the caps but the display is difficult to open. I can remove the plastic outer casing relatively easily but there is a lot of shielding inside.

I thought I'd ask here if it even worth looking at caps at all, maybe its just totally doomed.

Reply 5 of 9, by pan069

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Interestingly though, when I load the image I originally posted into Gimp and I invert the colors I get a pretty good looking results. I.e. all the correct color components seem to be there:

gjYp02M.jpg

Reply 6 of 9, by retardware

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I guess you are right in ditching the monitor. To me it looks like a 5:4, these cost next to nothing.

Reply 7 of 9, by pan069

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Yeah, trying to get my hands on a good quality (and affordable) 1600x1200, but no luck yet...

Reply 8 of 9, by rasz_pl

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not caps, its mechanical - rise in temperature makes something expand and stop conducting, can be ribbon connector, can be cracked solder joint, can be in the glass

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https://github.com/raszpl/386RC-16 memory board
https://github.com/raszpl/440BX Reference Design adapted to Kicad
https://github.com/raszpl/Zenith_ZBIOS MFM-300 Monitor

Reply 9 of 9, by tegrady

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retardware wrote:

I guess you are right in ditching the monitor. To me it looks like a 5:4, these cost next to nothing.

Yes. If you are in the United States, most Goodwill stores have tons of these 5:4 monitors for sale for about $8 to $12 on average.

I actually did find a 1600 x 1200 monitor, Dell 2000FP, at my local Goodwill. They are uncommon though.