PICO ITX/ATX PSU no go

[Lurch]

Hooked up everything power adapter/pico psu/atx adapter from amigakit no life. changed back to a standard atx psu powers up fine.

My machine is full of gremlins ;-)

Any tips, seems straight forward to hookup so don't think it's a setup issue. Will try the pico psu on a pc tomorrow.

[darkage]

Havent used Pico psu yet,  but do you have access to a multimeter?  

If so I would check the output on the  +5v, +12v, & -12v power lines.   The amiga just needs those with GND to be happy rjust make its getting supplied with that at a suitable amperage

[Lurch]

Will check that out, thanks Darkage.

[Lurch]

PICO is working! Downside is the electrical interference from it, it may need to go :-( Will have to try some sort of shielding, I have tried placing it inside the A500 case still same thing.
The interference is showing up through my svideo adapter that I bought through amigamaniac, maybe I need to shield that somehow :-/

The battle continues.

[darkage]

Its probably the small square inductors causing the RF Noise on the Pico PSU..

Hmm I guess try and make a metal enclosure for the Pico PSU and for the Svideo adapter  if possible..

Also you might want to put a RF Choke (ferrite bead) on cables going to/from the Svideo Adapter  (http://en.wikipedia.org/wiki/Ferrite_bead)

The video cable is probably acting like a big antenna for RF noise from PSU..

Also how about wiring in the Pico PSU in a small box in middle or near power plug end of cable perhaps using the original Amiga power plug.   Try and keep it far away from the unit.

Let us know how you go?

[Lurch]

I've tried placing the pico about a meter away from the 500 inside a box still getting the interference so it maybe using the lead heading to the 500 as an antenna?

Will purchase some RF chokes and try that, one on the svideo lead and one on the one running from the pico to the 500. :-)

Yep will let you know how I got on, need to post some pic's too :-)

[Lurch]

Well tried some RF Chokes on various leads.

- The cable from the PICO to the Amiga
- The cable from the S-Video adapter to the TV
- The cable from the R/L audio to the TV
- The power cables

Tried a sealed box, still no luck. Can see two bars of interference slowly rolling up the screen. If I remove the audio cables it makes it worse LOL.

If I switch it back to the standard ATX box no noise, so assuming a grounding issue?

Anyway not far off saving for an indivision so might not be an issue much longer.

Open to advice however! Pulling my hair out here :-(