Q: NeXT Cube showing distorted image on HP TFT

NeXT Computer, Inc. -> NeXT Black Hardware

Title: Q: NeXT Cube showing distorted image on HP TFT
Post by: the_traveller on January 28, 2016, 01:24:14 AM
I am having issues connecting my NeXT Cube to a HP L2035 display. Neither VGA nor DVI (VGA cable with an VGA-to-DVI adapter) are working.
The image is always distorted as shown in this video: https://onedrive.live.com/redir?resid=344E59C52557D1C5!230673&authkey=!AO5Vxaqyk2rEMvU&ithint=video%2cmp4

The Cube works perfectly well with a VGA-only no-name display. For different reasons I would prefer using the HP display though.

Can anyone tell me what causes this problem?
Thanks :)
Title: Q: NeXT Cube showing distorted image on HP TFT
Post by: barcher174 on January 28, 2016, 01:31:52 AM
I would guess your HP doesn't like the 68.3 Hz refresh rate of the cube. There are sometimes hidden advanced menus for additional monitor settings.
Title: Q: NeXT Cube showing distorted image on HP TFT
Post by: barcher174 on January 28, 2016, 01:54:54 AM
Looking at the user manual for you HP LCD it appears there should be a way to enter user defined screen resolutions.

Entering User ModesThe video controller signal may occasionally call for a mode that is not preset if:■You are not using a Hewlett Packard standard graphics adapter.■You are not using a preset mode.If this occurs, you may need to readjust the parameters of the monitor screen by using the on-screen display. Your changes can be made to any or all of these modes and saved in memory. The monitor automatically stores the new setting, then recognizes the new mode just as it does a preset mode. In addition to the 18 factory preset modes, there are four user modes that can be entered and stored.

http://www.manualslib.com/manual/71456/Hp-L2035.html?page=34#manual

Also here is the technical service manual

http://elektrotanya.com/hp_l2035.pdf/download.html
Title: Q: NeXT Cube showing distorted image on HP TFT
Post by: the_traveller on January 28, 2016, 08:27:16 AM
Quote from: "barcher174"Looking at the user manual for you HP LCD it appears there should be a way to enter user defined screen resolutions.

Thanks for your help :)

Unfortunately I can't find a way to enter those custom resolutions.
The regular OSD doesn't show any suitable options and googling for a solution brought me to a site (http://electronicshelponline.blogspot.de/2015/11/hp-l2035-tft-lcd-monitor-how-to-enter.html) which explains how to get into the "Service Mode" of the display. None of the three options works with my display :(

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