English Amiga Board - View Single Post - A2000 Autoconfig Help

thebajaguy · 30 January 2023, 19:27

Give the Hardframe's card edge connector a good cleaning with isoproply alcohol and a toothbrush. Same for any other cards in the Zorro bus. I cleaned up some instability on some systems recently that way.

A slight lift and re-seat of any DIP socketed chips on the card(s) might also help. Leave the PLCCs alone, although check them for cracks just in case.

The rev 4.x updates to Rev 4.5 - I would address Buster (if not MOS), Gary (if not MOS), and any parts they mention around the 74-series buffers. The rest is usually not critical unless a problem is seen.

Try also moving the J300 under the PSU area to the right - a dirty Tick signal from the PSU (possibly from aged caps, messy AC frequency) can cause some oddities sometimes, and this moves the clocking away from that. This position is used for ATX replacement PSUs that have no tick signal.

30 January 2023, 19:27	#20
thebajaguy Registered User Join Date: Mar 2017 Location: Rhode Island / United States Posts: 203	Give the Hardframe's card edge connector a good cleaning with isoproply alcohol and a toothbrush. Same for any other cards in the Zorro bus. I cleaned up some instability on some systems recently that way. A slight lift and re-seat of any DIP socketed chips on the card(s) might also help. Leave the PLCCs alone, although check them for cracks just in case. The rev 4.x updates to Rev 4.5 - I would address Buster (if not MOS), Gary (if not MOS), and any parts they mention around the 74-series buffers. The rest is usually not critical unless a problem is seen. Try also moving the J300 under the PSU area to the right - a dirty Tick signal from the PSU (possibly from aged caps, messy AC frequency) can cause some oddities sometimes, and this moves the clocking away from that. This position is used for ATX replacement PSUs that have no tick signal.