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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: PlatformerZ on February 24, 2026, 08:02:07 AM

Title: A1200 invisible mouse with floppy and HDD boot drops out
Post by: PlatformerZ on February 24, 2026, 08:02:07 AM
After fitting a D.K. Video Crisper RGB video buffer, which I hear is 15khz only; to the RGB port of my A1200 OS 3.9, before a Scandex doubler, I have no video signal; HDD activity stops, about when WB is loaded in startup.

I am using an external Scandex doubler to TFT monitor for both CGA and VGA modes. I tried a second Scandex and no change.

The Early boot menu shows but invisible mouse pointer. Floppy boot is the same.

From this thread: https://forum.amiga.org/index.php?topic=73237.0 I followed Oldsmobile Mikes' suggestion of swapping the ROM's for new ones and Accelerator card and PSU. Also disconnected mouse and Joystick. No Change unfortunately.  ???

Suggestions Welcome. TIA.