I have a Alpha 5 reeler here which will not boot up completely and stops at the screen shown in the picture. I keep rebooting the slot and after a number of times it finally boots and plays. Once it boots up correctly it will boot OK until you let it set overnight. Here is what I have done to try and correct the problem:
Exchanged CPUs but it still stopped booting at the screen shown
Exchanged power supplies with a know good pair
Used different OS card
Cleared the slot but it would not clear.
New batteries.
After it stays powered on for a while it finally corrects itself if I reboot and you can also clear the slot and reprogram and it works fine.
My thought is the backplane? Sounds like a capacitor problem somewhere but I am not sure where to start with that.
Any help appreciated. Thanks