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ELSA Winner 2000VL-4 VLB vertical lines issue

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First post, by Turboman

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When I run my ELSA card at post the vertical lines are barley visible. After about 5 mins or so they are at their worst. What could be the cause of this? I replaced the surface mount capacitor that was on the middle of the board because it was leaking a little bit, but that made no difference. The lines look like they vibrate and scroll. Was also wondering if there is a bios upgrade if such a thing exists on this card?

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Last edited by Turboman on 2019-08-27, 22:25. Edited 2 times in total.

Reply 2 of 4, by Turboman

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Few more.

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Reply 4 of 4, by elianda

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This is a common issue with TFTs. Your card is fine, your TFT can not cope with the analog signal. One origin is that higher end cards like the ELSA Winner2000 do not exactly use standard pixel clocks for low res/low refresh modes. Your TFT tries to compensate by shifting the PLL to fit the pixel clock to get a full width image. It does it rather bad obviously. This leads to vertical line artefacts.

If your TFT supports it use the refresh rate tool of the card to go to 75Hz or 85Hz for the low res modes.

Just as an example, if you look at the mode tables here for the various cards: http://retronn.de/imports/diamond_bible.html
You notice that some modes have no entry, like 800x600 at 70 Hz, whereas the same card can do 60 Hz and 72 Hz at the same resolution. That is the same problem as with your TFT, the card supports only certain frequencies.

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