Picasso IV issues

[Amigaz]

I am having some strange issues with my Picasso IV gfx card that I haven't used for a long time. It was working fine years ago in my A4000T hooked up to a CRT monitor.
I don't have any CRT monitors anynore so I am using TFT monitors, the screen modes tests out perfect in the Picassomode TNG utility but when I exit the utility the screen flickers and there's some artifacts sometimes on the screen. I have only been using the flicker fixer screenmodes.
Something is telling me the card is fine but I am doing something wrong?

The PSU is replaced with an ATX PSU using an ATX -> AT adapter. I've read somewhere that screen issues can be caused by a weak 5V rail but my PSU has 28A on the 5V rail so it should be OK?

 

[Boing-ball]

I am having some strange issues with my Picasso IV gfx card that I haven't used for a long time. It was working fine years ago in my A4000T hooked up to a CRT monitor.
I don't have any CRT monitors anynore so I am using TFT monitors, the screen modes tests out perfect in the Picassomode TNG utility but when I exit the utility the screen flickers and there's some artifacts sometimes on the screen. I have only been using the flicker fixer screenmodes.
Something is telling me the card is fine but I am doing something wrong?

The PSU is replaced with an ATX PSU using an ATX -> AT adapter. I've read somewhere that screen issues can be caused by a weak 5V rail but my PSU has 28A on the 5V rail so it should be OK?

Have had something similar happen to one of my PIV boards. Have attributed this to the following:

1).. May need a recap on the capacitors
2).. My board has the Flickerfixer separated and is using one of these 3rd party connectors to connect the flicker fixer to the main PIV board. I have noticed if I push the PIV board up, then the issue resolves iteself.

 

[Amigaz]

Have had something similar happen to one of my PIV boards. Have attributed this to the following:

1).. May need a recap on the capacitors
2).. My board has the Flickerfixer separated and is using one of these 3rd party connectors to connect the flicker fixer to the main PIV board. I have noticed if I push the PIV board up, then the issue resolves iteself.

Caps "look" fine and the video slot connector has never been broken loose

 

[Boing-ball]

Caps "look" fine and the video slot connector has never been broken loose

Caps may look good. But you never know. With you mentioning it worked a few years ago etc… Capacitor Ratings can drop. Doesn’t mean they need to leak to become faulty.

Other things to try, is make sure that all the connectors and Zorro slots are not gunked up. Dry contact cleaner for deoxit on them just incase.

 

[fgh]

Matze experienced issues with Picasso IV in A4000T when using the top two zorro slots.
He figured out his problems were due to the zorro bus termination being insufficient for the 4000T.

He made some active terminators that fixed the issue.

As your card is still in one piece, you could check if moving it to slot #2 helps (if it’s currently at slot #1, that is), or try it in a different amiga model.

Otherwise, artifacts can occur with poor connection on RAM chips, common on CV64 with its RAM sockets.

No RAM sockets on PIV though, but I’d still try pushing down on anything socketed

 

[keropi]

Could it be that the ff modes are 50hz and that the TFT monitor does not like them?
What if you change to a NTSC screen mode?
Perhaps monitor needs 60hz

 

[Amigaz]

*Update*

Partial success ... I sprayed the whole card with WD 40 Contact Cleaner and went over it with a tooth brush. Pushed in all the PLCC chips and socketed chips.
Now I have a solid FF output.
I had previously only cleaned the video och ZIII slots plus the PIV card edges and VGA connector.
And yes, I have tested both video slots.
In my A4000D I got no output from the card at all, might be a result of that I am using a modern SFX PSU in it which might have a weak 5V rail .. I haven't looked into that yet.