Amiga 4000 takes eight minutes to boot (solved) sort of

[Vlabguy1]

Do you have an A3640 card? Seems like a good place to start. If possible get the machine back to bone stock ..no hard drive and real floppy drive. Seems kind of odd that this started happening after the software update. Which in way might be blessing that it’s not a hardware issue..but then again these old machines are sensitive.

Rich.

[Vlabguy1]

No other card. Actually it all started when i removed old old roms then installed new. Software worked well with 3.1 roms.
When I reinstalled old 3.1 roms issue remained.
One too many times removing warp card/roms may have done something possibly.

I guess it is possible something might have happened removing the warp/roms. A shame you dont have another cpu card, makes testing/troubleshooting a little more difficult. 

Rich

[Vlabguy1]

Why always this amount of time?

Outside chance of it being a fault with the reset circuit,

This times a specific time by charging up a capacitor, if the resistor feeding it developed a higher resistance, it would take longer to charge.

Oh, that chip also handles some timing signals as well as the mouse, so  could just be that one chip (more likely connections to and from it).

Could be. But seems odd that he is just having this issue after making a rom/software change. You would think these issues would have occurred before if not just more randomly. But again these old machines tend to do better the less you mess with them. Could always check the power supply output voltages. Without having another machine or other parts to swap and test and not seeing anything visibly wrong with any of the boards this could take a while to resolve..

[Vlabguy1]

Any change or update?

[Vlabguy1]

Yes a stock cpu board would be key at this point.

[Vlabguy1]

take the memory sticks out one by one and booting the machine after each removal.

[Vlabguy1]

yeah I know what you mean. Ive seen plenty of Amigas with hot glue holding the memory chips.

[Vlabguy1]

These jumpers are on the accelerator/processor card?

[Vlabguy1]

Dang. Pick up a 3640 card...would have been quicker to find the cause of the issue. So seems something is up with the Warp card?