Resistor value for v1.4 Picasso II board.

[57goldtop]

My board has a burned resistor in exactly the same position as this board found on the Amiga hardware database, you can see the location of it in the photo just below some hand written letters on the right hand side of the board near one of the video ports.

Does anybody who has this version know of that resistor's value ?

Thanks.

[57goldtop]

So they are all the same value in that location ? I'm at work right now so I can't check again.

Is this a common failure on these boards ? I wonder if it's caused by another faulty component. Might try a 1/2 watt resistor instead and see how I go.

[57goldtop]

I have an open circuit there, so i don't know if the monitor will display anything at all, the seller mentioned that his LCD monitor died, I don't know if that is a direct result of the faulty resistor on the card.

Will replace with a bigger resistor.

Cheers.

[57goldtop]

Quarx, the resistor have the value altered by repeated heat issues.

The value in resistance or the size ?

[57goldtop]

Replaced the resistor with a 22ohm but the display is not stable. Maybe the value is not correct ??

I get a rolling picture whenever I test any of the Picasso modes in the ScreenMode prefs. I have OS 3.9 installed, Picasso96 drivers, no other drivers installed

Replaced all caps on the card too, tried different monitor displays but it didn't help.

I guess it might be better to get another card.

[57goldtop]

Resistors tested fine and I changed every single cap in the card.

The problem could lie within the A3000 power supply. I often see funny little lines on the screen when wb windows pop up, the lines dissappear if windows are moved to overlap the lines or if the screen is refreshed.

I'll test the card in my A4000 to see what happens.

Cheers.

[57goldtop]

After testing the card in my A4000 it worked.I also heard the clicking sound of the relays, never heard that before.

I then reinstalled the card in my A3000 and it worked for the first time. Sounds strange considering that I tried practically everything else to get the card to work, the only explanation seems to be is that the caps near the relays were still charged after the card was powered up in my A4000.

Is there any good online reference material for troubleshooting & repairing an A3000 PSU ?

Cheers.

[57goldtop]

I think it would be best to just order a tower and put the standard case aside. Unless of course there are replacements that will fit inside a standard A3000 case.

As a test I converted an ATX PSU to connect to the Amiga last night, those funny lines are gone & now I can use all of the higher res screen modes I couldn't get with the original PSU.