English Amiga Board - View Single Post - Amiga 500 keeps rebooting, then works fine

amigaosx · 31 July 2015, 01:46

Hi,
the problem is that the Amiga 500 keeps rebooting until it works fine.
It shows the light grey, white screen, the keyboard leds blinks, all this for a couple of minutes more or less, until it does a final reboot and everything works fine. It responds to the CTRL+A+A meanwhile is booting.
Video here: [ Show youtube player ]

It does this only the first time I power it up. It's like it needs to get 'warm'.

Things I've tried:
- re seating all chips
- cleaning motherboard with contact cleaning
- removing all chips, cleaning sockets
- removing 512k ram expansion (trapdoor)
- trying a different disk drive

Today I've replaced a couple of burned resistors (R401 and R408), a user told me that they were just for controlling voltage to the joy ports.
But the problem is still there.

Could this be the capacitors?
I have this Amiga since 1990, it's a rev 6A-A03

31 July 2015, 01:46	#1
amigaosx Registered User Join Date: Aug 2014 Location: Montevideo Posts: 59	Amiga 500 keeps rebooting, then works fine Hi, the problem is that the Amiga 500 keeps rebooting until it works fine. It shows the light grey, white screen, the keyboard leds blinks, all this for a couple of minutes more or less, until it does a final reboot and everything works fine. It responds to the CTRL+A+A meanwhile is booting. Video here: [ Show youtube player ] It does this only the first time I power it up. It's like it needs to get 'warm'. Things I've tried: - re seating all chips - cleaning motherboard with contact cleaning - removing all chips, cleaning sockets - removing 512k ram expansion (trapdoor) - trying a different disk drive Today I've replaced a couple of burned resistors (R401 and R408), a user told me that they were just for controlling voltage to the joy ports. But the problem is still there. Could this be the capacitors? I have this Amiga since 1990, it's a rev 6A-A03