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Windows98Se no VGA Signal after switching Monitor

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First post, by Jackhead

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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.??

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - AMD A5x86 X5 ADZ 133MHz @160MHz - 64MB RAM - CT2230 - GUS ACE - MPU-401 AT - ET4000W32P
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI @ 66MHz PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 2 of 7, by Jackhead

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

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - AMD A5x86 X5 ADZ 133MHz @160MHz - 64MB RAM - CT2230 - GUS ACE - MPU-401 AT - ET4000W32P
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI @ 66MHz PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 4 of 7, by Jackhead

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

Dos 6.22: Asus VL/I-486SV2GX4 Rev 2.0 1Mb L2 - AMD A5x86 X5 ADZ 133MHz @160MHz - 64MB RAM - CT2230 - GUS ACE - MPU-401 AT - ET4000W32P
Win98SE: Asus P5K-WS - E8600 @ 4,5GHz - Strange God Voodoo 5 6000 PCI @ 66MHz PCI-X - 2GB DDR2 1066 - Audigy 2 ZS

Reply 6 of 7, by Horun

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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

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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.

Open Source AT&T Globalyst/NCR/FIC 486-GAC-2 proprietary Cache Module reproduction

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