No Analog Video on my 1200

[bluewater41]

Hello fellow Amiga users, iam strictly amateur diagnosing problems!


i do have Digital Video but no Analog, Can some one givee advice
what coul;d it be, Thanx in Advance!


Michael Weathers

[Edders]

What do you mean with "Digital Video"? A stock Amiga will only produce analogue video.

[XPD]

What are you plugging into ?

[roondar]

Originally Posted by Edders

What do you mean with "Digital Video"? A stock Amiga will only produce analogue video.

It actually also produces TTL digital (like CGA), though almost no one used it

In fairness I don't know if all models support this (I'm assuming the A1000 does for sure), but it's on the pinout of the video connector at any rate. Pins 7,8 and 9 to be exact.

[Edders]

Originally Posted by roondar

It actually also produces TTL digital (like CGA), though almost no one used it

In fairness I don't know if all models support this (I'm assuming the A1000 does for sure), but it's on the pinout of the video connector at any rate. Pins 7,8 and 9 to be exact.

Yes, you're absolutely right - this is confirmed by the hardware manual on the video pin-out page here. Please note that the page only mentions A500, A1000, A2000 and A3000 but was published before AGA and therefore before the A1200 existed.

[RetroPassionUK]

If your using Composite/RF and you are getting no signal it maybe down to the caps have leaked and damaged a track or two, it can be repaired if course, but if the unit has not been recapped then it needs to be done and the leakage cleaned up :-)

https://www.retropassion.co.uk/amiga...essary/page/3/

[Daedalus]

The digital video output pins are connected in every Amiga as far as I'm aware, and are generally connected to the high bits of the video data from the Denise / Lisa chip for approximately CGA-style colour. So the additional area involved in the analogue output is the video DAC and its support components. It's unlikely that all 3 colour signals would have the same fault, so it's more likely to be one of the common components like the DAC itself, the F139 chip that provides the sync signals to the DAC, or the voltage reference to the DAC.

Or, of course, damage to a trace of via carrying one of the signals involved. There are a couple of SMT capacitors near that area that are prone to leakage and could have damaged some of the circuitry.

[Lord Aga]

Originally Posted by XPD

What are you plugging into ?

Please be 1 please be 1

[bluewater41]

Hello to all reponses, I should said my 1200 is connected with Indivision MK2 Adapter from Lisa chip to HDMI of Tv. Workbench loads fine but if i run a program say Disk Master 2 screen goes black & says input not supported.
I tried different Video drivers under workbench same result.
What is going on?


Mike Weathers

[RetroPassionUK]

Originally Posted by bluewater41

Hello to all reponses, I should said my 1200 is connected with Indivision MK2 Adapter from Lisa chip to HDMI of Tv. Workbench loads fine but if i run a program say Disk Master 2 screen goes black & says input not supported.
I tried different Video drivers under workbench same result.
What is going on?


Mike Weathers

Thats a MK2 setup issue, I would reset it back to default settings, guide here

http://eab.abime.net/showthread.php?t=86558

[Leon Besson]

Originally Posted by bluewater41

Hello to all reponses, I should said my 1200 is connected with Indivision MK2 Adapter from Lisa chip to HDMI of Tv. Workbench loads fine but if i run a program say Disk Master 2 screen goes black & says input not supported.
I tried different Video drivers under workbench same result.
What is going on?


Mike Weathers

Yo! Bromigo!

You need to get hold of the Indivision Tools from iComp.de

http://wiki.icomp.de/wiki/Indivision_AGA_MK2

This will then allow you to test the different outputs safely and also re-program the cores on MK2

Remember Mang! This ain’t a PC and nothing is truly plug and pray

Also to remember to make sure you have the necessary Monitor files in Devs:Monitors. Such a HighGFX monitor if planning to use a WB screen @ 1024x768

[bluewater41]

Well i tried to reset config on Mk2 through the tool from individual computers.
now i have a doorstop of Indivion MK2 I have to find someone help me get some good screen modes. right now strictly a black screen.


Miuke Weathers

[Leon Besson]

Originally Posted by bluewater41

Well i tried to reset config on Mk2 through the tool from individual computers.
now i have a doorstop of Indivion MK2 I have to find someone help me get some good screen modes. right now strictly a black screen.


Miuke Weathers

Bromigo! Have a look at this;

https://www.lemonamiga.com/forum/viewtopic.php?t=12566

As I said before this ain’t plug and play.

It could be your monitor/TV can’t support the modes. Most will tell you this, but older monitors, especially before 2010 may not have the means.

You really haven’t given enough information on your setup.

[bluewater41]

Well I Presvered got my MK2 up & running again, although there are a few programs that will not open up in workbench. Iam using High Graphics driver.
1 is DM2 & Fianal Calc. Most of them work tho. Thanx to everyone for the ideas.


Michael Weathers

[Leon Besson]

Originally Posted by bluewater41

Well I Presvered got my MK2 up & running again, although there are a few programs that will not open up in workbench. Iam using High Graphics driver.
1 is DM2 & Fianal Calc. Most of them work tho. Thanx to everyone for the ideas.


Michael Weathers

Good stuff Bromigo!

It’s the only way to learn in the world of Amiga.

[vk3heg]

Originally Posted by bluewater41

Well I Presvered got my MK2 up & running again, although there are a few programs that will not open up in workbench. Iam using High Graphics driver. 1 is DM2 & Fianal Calc. Most of them work tho. Thanx to everyone for the ideas.

You want a Mode Promotion program, from aminet:

http://aminet.net/search?query=mode+promotion

I've used ModePro.lha in the past and it worked for the programs I needed.