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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: gibs on March 27, 2013, 06:54:30 PM

Title: Picasso II issue ?
Post by: gibs on March 27, 2013, 06:54:30 PM

Hello,

I have purchased a Picasso II that I plan to use on a LCD.

The problem is that I get some horizontal parasite, and sometimes some waves on icons and the overall GUI which is annoying.

Here is a picutre : https://dl.dropbox.com/u/1566495/Amiga/photo.JPG

Someone had this problem ? what can it be ?

Can it be the 3 470uF capacitors ?

Thanks

Title: Re: Picasso II issue ?
Post by: kamelito on March 27, 2013, 08:38:29 PM

Quote from: gibs;730557

Hello,

I have purchased a Picasso II that I plan to use on a LCD.

The problem is that I get some horizontal parasite, and sometimes some waves on icons and the overall GUI which is annoying.

Here is a picutre : https://dl.dropbox.com/u/1566495/Amiga/photo.JPG

Someone had this problem ? what can it be ?

Can it be the 3 470uF capacitors ?

Thanks

 This thread an others inside it might help you. http://eab.abime.net/showthread.php?t=51133  Kamelito

Title: Re: Picasso II issue ?
Post by: gibs on March 27, 2013, 10:02:44 PM

Thanks Kamelito,

I have removed the resistor before using the board.
I tried with another monitor and a different VGA cable.

The result is the same.

Title: Re: Picasso II issue ?
Post by: gertsy on March 28, 2013, 12:20:34 PM

Quote from: gibs;730571

Thanks Kamelito,

I have removed the resistor before using the board.
I tried with another monitor and a different VGA cable.

The result is the same.

Hmmm, does not bode well.

Title: Re: Picasso II issue ?
Post by: Framiga on March 28, 2013, 01:20:06 PM

Quote from: gibs;730557

Hello,

I have purchased a Picasso II that I plan to use on a LCD.

The problem is that I get some horizontal parasite, and sometimes some waves on icons and the overall GUI which is annoying.

Here is a picutre : https://dl.dropbox.com/u/1566495/Amiga/photo.JPG

Someone had this problem ? what can it be ?

Can it be the 3 470uF capacitors ?

Thanks

at what resolution/colour depth? IIRC PicassoII, have only 1 or 2 MB of VRAM.

Title: Re: Picasso II issue ?
Post by: gibs on March 28, 2013, 10:22:04 PM

Hi thanks for your answers

Every resolution I use I get the same waves around the GUI and some horizontal lines that scroll up...

Title: Re: Picasso II issue ?
Post by: ElPolloDiabl on March 29, 2013, 10:03:52 AM

That is an analogue signal. I suggest you check a bunch of old tv repair sites to find out what could cause things like that. It would help you narrow down the problem, rather than just trying everything.

Title: Re: Picasso II issue ?
Post by: 57goldtop on March 29, 2013, 06:39:18 PM

I had a similar issue with my Picasso II some years ago, a rolling display with lines. I couldn't get in to any of the screen modes. I replaced all the caps on the board and replaced the burnt resister with a larger 1/2 watt resistor of the same value to prevent the same failure ( a common failure in these cards ) but it made no difference.

The fix was replacing the power supply in my A3000. It might be a good idea to check your PSU voltages under load to see if there's a problem there. There are two relays in the Picasso II and you should be able to hear them pulse as you activate one of the screen modes.