Minimig Discussion Forum

Discussing the Open Source FPGA Amiga Project
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 Post subject: Minimig stoped working
PostPosted: Tue Mar 13, 2012 6:48 pm 
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Joined: Fri Mar 06, 2009 4:51 pm
Posts: 19
my minimig works when first time switch on, then it dont boot, if I wait one day and replug to electrcity and works again until today, right now it does not boot anymore, does any one any idea ?


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 2:08 am 
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Joined: Sun Jan 31, 2010 9:52 pm
Posts: 27
Maybe the powersupply is broken ?


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 2:33 am 
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Joined: Fri Mar 06, 2009 4:51 pm
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I tried different one, same result


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 8:52 am 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1568
Location: .de
How does the LEDs behave?

There are some error blink DRIVE LED code embedded in PIC/ARM firmware.
Otherwise the Power-LED shoud flicker and the bootloader screen is visible.

If Minimig don't show any screen output, the FPGA is not loaded (with Chipset core) and the main reason for this is a bad lead contact to SD-Card in its slot. It also could be a bad pin lead contact of PIC socket.

Please check and report :)

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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 9:08 am 
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Joined: Fri Mar 06, 2009 4:51 pm
Posts: 19
red & blue leds are on and solid, no screen,


I checked 3 voltage regulators, the one upper side on the board has 5V input and 3.3V output it seems its o.k, the other two regulators under fpga and located on bottom side of pcb has same voltage inputs 5V, one's output is 2.5V other one is about 1.25V is it o.k ?


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 2:06 pm 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1568
Location: .de
What about DRIVE led?
It should blink if there is no sd-card or other error and flicker fast when uploading the FPGA core.

Measured voltage are OK, no probem there.

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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 4:12 pm 
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Joined: Fri Mar 06, 2009 4:51 pm
Posts: 19
no action on drive led,


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 5:31 pm 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1568
Location: .de
ozkano wrote:
no action on drive led,


Thats bad.
In this case the PIC or ARM chip is not working and whole Minimig can not operate.

First you should check the socket.
If attached PIC or ARM controller has no good seat or contact, the chip can not work properly.
In some cases the metal leas contact pins in socket got weak and will cause problems.
In such case the socket need to be replaced.

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JMP $00000BED ; will guru-meditation until next morning


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 5:44 pm 
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Joined: Fri Mar 06, 2009 4:51 pm
Posts: 19
boing4000, do you pic firmware may be pic may be proken


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 Post subject: Re: Minimig stoped working
PostPosted: Wed Mar 14, 2012 7:49 pm 
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Joined: Mon Dec 01, 2008 9:58 pm
Posts: 1568
Location: .de
It could have some reason when PIC don't work.

Socket contact problem is my first idea, but it also could be the 20MHz oszillator (X2) close to PIC socket or one of the 2 capacitor (C49 / C51).

Did you use current firmware release or some rather old one?
Very first version of PIC did not blink DRIVE led and also had sometimes trouble in detecting sd-card.

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