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A1XE Uboot traces
Quite a regular
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Since thrusday evening my A1XEG4 suddenly choosed to refuse to boot. In fact it was running while the system froze (as I was running a debug session) I thought it was my fault, but neither soft nor hard reboot bring it back to life.

At some time I got this from Uboot trace :
U-Boot 1.1.1 (Mar  3 2005 16:42:53), Build03/03/05                                                      

CPU
:   MPC7455 v2.1 800 MHz                             
Board
AmigaOne
DRAM
:  Slot 0vacant                     
Slot 1
vacant              
Slot 2
vacant              
DIMM0_B0_SCR0 
0x00000000                          
DIMM0_B1_SCR0 
0x00000000                          
DIMM0_B2_SCR0 
0x00000000                          
DIMM0_B3_SCR0 
0x00000000                          
DRAM_GCR0 
0x00000000                      
Refresh set to 2083 clocks
auto refresh on                                           
DRAM_REFRESH0 
0x00019823                          
*** failed ***              
### ERROR ### Please RESET the board ###


Can someone explain me if this is refering to the 512 MB memory stick I have in it or to something else.

Then I eventually managed to get it started friday and thought it was just a matter of dust and moved connections but despite it rebooted fine yesterday it went to black screen during inactivity and refused since now to reboot correctly. However now I can see that UBoot seems to go well and even launch OS 4.1 only I see that
VGA NOT PRESENT

Can I safely try to source a supported VGA card or will I eventually find after having one that it fails on something else ?
Can a weak CPU connection provoques such errors ? (I want you to note that I never unfitted nor changed anything on my CPU module, it stayed like it is since I bought it back in 2004).

Please help me

Back to a quiet home... At last
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Re: A1XE Uboot traces
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@abalaban

Not sure i can be of any help. But the things i did when my A4k didn't start was to pick it apart. Clean all parts,then assemble it again. And put back only the things that are essensial for the machine to work. It could be that a card,mem stick has loosened from the slot,if you're lucky. And the cpu card might be a bit loose?? And check that the cpu fan is sitting ok.

X5000
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Re: A1XE Uboot traces
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@abalaban
Tryed to change the clock battery?
Many weiord problems was caused by a weak battery on A1...

Simone"Tuxedo"Monsignori, Perugia, ITALY.
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Re: A1XE Uboot traces
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EDIT double post...sorry!

Simone"Tuxedo"Monsignori, Perugia, ITALY.
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Re: A1XE Uboot traces
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@Tuxedo

Of course common things have been done :
- battery change
- unplugging, replugging cards,
- dust blowing

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Re: A1XE Uboot traces
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@abalaban

Quote:

Can I safely try to source a supported VGA card or will I eventually find after having one that it fails on something else ?


The only answer to this is 'try it'. I supose you have no way to test your current board in another machine?

If reseating it worked once, try again, you never know.

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Re: A1XE Uboot traces
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Hi @abalaban

Can I safely try to source a supported VGA card or will I eventually find after having one that it fails on something else ?
UBoot ROM starts up the VGA card. If it doesn't remove the ROM chip carefully with extractor and spray clean socket and wires with a good electrical cleaner that doesn't leave any residue. Put the chip back in carefully. I've been here and it and it works! Ask Noel Fuller if it works?

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Re: A1XE Uboot traces
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@broadblues

Quote:
If reseating it worked once, try again, you never know.

Of course I already tried it : cleaned contacts with Alcohol and reseat it without luck...

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Re: A1XE Uboot traces
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@abalaban

Tried different power supply?

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Re: A1XE Uboot traces
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@HammerD

Yes but I'm not sure about the one I tried Anyway there was no change at all.

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Re: A1XE Uboot traces
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@abalaban

remove the battery unplug it from power grid, have it tuned off for a day, this should reset the CMOS, oh and get a new battery.
and maybe you should try to find a different ATI GFX card, you never know.

(NutsAboutAmiga)

Basilisk II for AmigaOS4
AmigaInputAnywhere
Excalibur
and other tools and apps.
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Re: A1XE Uboot traces
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@LiveForIt

Yes I already changed the battery but I'm reluctant to buy a new GFX card if the problem is elsewhere... My budget is very tight those days and I would rather prefer saving money for a new system than spending it on a pointless GFX card...

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Re: A1XE Uboot traces
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@abalaban

Quote:
Can a weak CPU connection provoques such errors ?


It's possible. There are 483 connections - CPU to PCB - any one of which fails could give any number of problems I'd guess? It was failed contacts here that was the problem with my A1XE. Of course, it would be wise to try everything else before playing around with the CPU module.

http://www.amigans.net/modules/newbb/ ... =ASC&type=&mode=0&start=0

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