A520 Juming Screen Only Before Workbench

[AmigaHeretic]

Well, maybe, but the monochrome output works just fine (no jumping picture). I have a one meg agnus so maybe I could switch it? You don't think its a kickstart issue then?

Strange issue.  If it was me I would start by re-seating all the chips including kickstart.

But I don't know how likely it's the kickstart either (or any pal issue) since everything works fine from the monochrome.  I would suspect something with the RGB port or A520.  But since the RGB port with A520 works fine when loaded I'm at a loss as to what that could be either.

[AmigaHeretic]

The only thing that got me thinking kickstart is that I noticed that for like half a second the screen turns red when I first turn the amiga on.

Yeah, I think red is for rom issue on startup.  So worth re-seating and checking.  Maybe the rom issue is having effect on the rgb port, but not the b/w video out.

[AmigaHeretic]

Turned out to be my tv. I connected the amiga to my tv and the jumping picture happened. Connected my amiga to my pc via the capture card (same cables) and PERFECTION. Weird problem... It's a cheap polaroid tv that has been known to also turn only one channel on our satellite service purple. I assume it assume the tv won't hurt my amiga will it?

That was pretty weird. Reminds me of a time I somehow moved the brighness on my 1084 all the way down so there was no visible picture.  I had an A2000 at the time.  I tore it all apart, PSU out, and everything.  I cleaned it all up, reseated chips, tried different configs of cards.  Always a blank screen.

When I noticed the knob was turned down I felt totally stupid.  Had a nice clean A2000 though.