Windows98Se no VGA Signal after switching Monitor \ VOGONS

Windows98Se no VGA Signal after switching Monitor

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First post, by Jackhead

Posted on 2023-12-15, 16:04

Jackhead Offline

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I have a windows98SE System that are working with a voodoo output VGA to a CRT.
Now i want switching to a TFT/LCD solution and get the problem that when i booting into windows the VGA Signal get lost.
I can boot safemode and i got a picture. I testet another cable and TFT same problem.
First i was thinking that have something todo with wrong resolution so back on a crt booting into windows and switching the resolution turn Frequenz to 60Hz.
But again no VGA Signal when i try booting into windows.??

Win98SE: Asus XG DLS - 1x P3 Xeon SL4XY 900/100/2- SG Voodoo 5 6000 PCI - 1GB RAM ECC- Diamond Monster Sound MX300 - Roland MPU-401AT (Yucatan FX)

Reply 1 of 7, by DerBaum

Posted on 2023-12-15, 16:17

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Does the tft show "out or range" or something like that ? ... Or does it act like there is really no signal?

FCKGW-RHQQ2

Reply 2 of 7, by Jackhead

Posted on 2023-12-15, 16:21

Jackhead Offline

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It goes to "no signal". I dont get why my CRT works and any TFT dont.

Win98SE: Asus XG DLS - 1x P3 Xeon SL4XY 900/100/2- SG Voodoo 5 6000 PCI - 1GB RAM ECC- Diamond Monster Sound MX300 - Roland MPU-401AT (Yucatan FX)

Reply 3 of 7, by ElectroSoldier

Posted on 2023-12-15, 19:26

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Not even the BIOS screen shows on a TFT?

Reply 4 of 7, by Jackhead

Posted on 2023-12-15, 22:21

Jackhead Offline

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it after the win98 splash screen so i assume its from the os switching something wrong

Win98SE: Asus XG DLS - 1x P3 Xeon SL4XY 900/100/2- SG Voodoo 5 6000 PCI - 1GB RAM ECC- Diamond Monster Sound MX300 - Roland MPU-401AT (Yucatan FX)

Reply 5 of 7, by giantclam

Posted on 2023-12-15, 22:54

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Model of TFT?

Reply 6 of 7, by Horun

Posted on 2023-12-15, 23:13

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Yes need model of the LCD. Ok so set at 60hz....And what resolution do you have it set at ? Try 800x600.

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 7 of 7, by rasz_pl

Posted on 2023-12-16, 05:42

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Might have something to do with https://en.wikipedia.org/wiki/Display_Data_Channel Video card might fail to detect any monitor and shuts down output? What monitor do you have configured in win98? I suggest you delete it or force generic nonPnP VGA one.

https://github.com/raszpl/sigrok-disk FM/MFM/RLL decoder
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module (AT&T Globalyst)
https://github.com/raszpl/386RC-16 ram board
https://github.com/raszpl/440BX Reference Design adapted to Kicad

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