@SoundSquare

It is probably down to your DVI-VGA adaptor on the SAM 440.
These dongles use the DVI-A (DVI Analog) pins C1-C5, which provide analogue RGB and horizontal or line sync.

A quick search on ebay for that monitor reveals the following:

Video and Synchronizing signal:
- Video Frequence: analog level
- Line synchronization: TTL positive logic/negative logic
- Frame synchronization: TTL positive logic/negative logic
- Pixel frequence: 120MHz (Maximum)
- Display color: Subject to VGA card
- Video signal and input: 0.7Vpp
- AV, TV and PC (3 in 1) display
- Horizontal frequence: 68KHz (Maximum)
- Frame frequency: 75KHz (Maximum)

The important point here is that it need a frame synchronisation signal, which is not provided by the DVI-A connection.

The Amiga provides Horizontal/Line and Vertical/Frame syncs and a composite sync.

Unless you have a VGA connector on your graphics card, I can not see a solution.

Ian

@Effy

You order will be dispatched today (11th August)

@Rudei

Yes the board made it through customs.
Subsequent boards came through easier and also run Linux nicely.

Ian

Hi,

Sorry for not being involved with this forum as much as I should, life has been a bit hectic.

Anyway, I now have available some ATX power adapters for the A500/A600/A1200. These simplify the connection of a new, higher current power supply.

Full details are here:
http://www.ianstedman.co.uk/Amiga/ami ... x_adaptor_order_page.html

I currently have 40 units available.

Bye,

Ian

Hi,

Been following the thread for a bit, thought I should add my usual advice in this situation.

Clean the A1200 CPU slot connector and the accelerator card connector using contact cleaner, then when it is dry, try it all again. I had to do this every 6 months on one of my Amigas.

Oh also check the Kickstart ROMS are firmly in their sockets.

Good luck,

Ian