In the meantime I have dug out another A600, that not yet has been recapped. This one works flawlessly with and without the Vampire and the same PSU.
And what's more: at last I could pop the Vampire on the CPU rock solid for the first time. It always was a mess with a non starting A600, having to push the Vampire before it would do anything or giving a green or yellow display. This very problem I also had with the Vampire V1.
Now the question is: what can be wrong with the recapped A600? I will try to resolder the CPU. Anything else I should take care of? In a thread on EAB I read that this behaviour would be a capacitor problem.
Shooting from the hip, I would guess one of your new capacitors has failed. A delay like this is consistent with a leaky cap taking some time to get charged. Is the delay getting longer? If so, the cap is probably on it's way to never charging fully and A600 to never booting.
