Preferred way of substituting TFT for CRT Monitor?

Cliff Miller cliff52 at
Sun Jan 7 11:06:38 CST 2018

I see a thread with the above title started by *MartinHepperle *concerning
the use of modern VGA flat panel displays with video from the 98204B
composite video board in the HP 9817 computer.
The problem is that the high horizontal scan rate of 25khz prevents modern
panels from locking onto the video. Mr. Hepperle mentions the possible use
of a scan converter available from that auction house, the Gonebes GBS-8200.

I write to report the successful use of this device with an HP 2009m
VGA-only flat panel monitor and the subject video board and computer. I
input the video to the "Y" input of the YPbPr inputs of the device.

I hope someone finds this useful.

Photo of converter:
Resulting video:
Cliff Miller
cliff52 at

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