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Author Topic: ACA 500 not booting  (Read 6259 times)

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Offline ChartusTopic starter

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ACA 500 not booting
« on: January 07, 2014, 06:48:46 AM »
I have a rev 5 A500 that works great until I plug in the ACA 500.  No boot, black screen and no power light on the computer.  Cntrl amiga amiga  results in the screen flickering and I get a white screen most of the time.  An infrequent yellow screen and just once I got a purple screen.  Take out the ACA 500 and everything works.  I have another A500 MB (rev 5) that I tried with the same results.

Is the Rev 5 MBs incompatible with the ACA 500

By the Way one has V2.05 kickstart  and the other has v1.2
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Offline gertsy

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Re: ACA 500 not booting
« Reply #1 on: January 07, 2014, 07:08:23 AM »
Rev 3 and below is incompatible. Can't find any info on supported internal KS version. Contact your supplier.
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Offline VingtTrois

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Re: ACA 500 not booting
« Reply #2 on: January 07, 2014, 11:22:59 AM »
Quote from: Chartus;756554
I have a rev 5 A500 that works great until I plug in the ACA 500.  No boot, black screen and no power light on the computer.  Cntrl amiga amiga  results in the screen flickering and I get a white screen most of the time.  An infrequent yellow screen and just once I got a purple screen.  Take out the ACA 500 and everything works.  I have another A500 MB (rev 5) that I tried with the same results.

Is the Rev 5 MBs incompatible with the ACA 500

By the Way one has V2.05 kickstart  and the other has v1.2



I've an A500 Rev5 + ACA500 (Firmware V081). I had some problems to run the card but I adjusted the card by moving it into the slot (Power off). Make some tests with swapping your PSU & try to clean your A500 connector!
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Offline Oldsmobile_Mike

Re: ACA 500 not booting
« Reply #3 on: January 07, 2014, 04:29:52 PM »
Sounds like a power problem.  Try with a different PSU, also make sure the edge connectors are clean.
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #4 on: January 07, 2014, 04:52:40 PM »
It was the same power supply I used for both boards when I tested the ACA .  I have cleaned the edge connectors and I think they are clean enough for it to work.  

I guess I will wire up another power supply and give it a try.  Right now I am using an AT power supply out of an old IBM PS1 computer.  Never had any native Amiga power supplies for any of my machines.

I have a new AT power supply.  Just need to find it.

Thanks for the suggestions.  I welcome any more thoughts anyone might have.  We are here to learn.
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Offline Djole

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Re: ACA 500 not booting
« Reply #5 on: January 07, 2014, 05:15:11 PM »
DOA unit is also always possible.

ACA500 is not really well ESD protected :) being in the open like that.
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #6 on: January 12, 2014, 05:41:58 AM »
Finally got around to trying a new power supply.  Wired up a new ATX power supply and turned it on.  Nothing....black screen....same as before.  Started tapping the numlock key.  The light turned on and off about six times and then stayed off.  I think I read somewhere that this indicates a bad CPU.  I unplug the ACA and the computer works fine.  

Do you think that the CPU is bad or might it be something else.  I did notice that some of the solder points that hold the edge connector  on are less than perfect.  I think they are making contact though.

The power Led does not light up with it installed if that's is any help[
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Offline AmmoJammo

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Re: ACA 500 not booting
« Reply #7 on: January 12, 2014, 05:51:03 AM »
Quote from: Chartus;756984
I did notice that some of the solder points that hold the edge connector  on are less than perfect.  I think they are making contact though.[

Got a pic? doesn't sound very good.
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #8 on: January 12, 2014, 06:33:42 AM »
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #9 on: January 12, 2014, 06:37:57 AM »
You know looking at the pictures I just took.  I would be embarrassed to sell something that bad.  Need better quality control.
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Offline AmmoJammo

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Re: ACA 500 not booting
« Reply #10 on: January 12, 2014, 06:43:54 AM »
Oh, its through hole that just hasn't wicked through... That isn't so bad ;)
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #11 on: January 12, 2014, 09:51:10 AM »
You think if I reflow the pins if it would help.  Not looking forward to sending it back. It looks Ok on the other side.  I think I will see if any of them are loose. Looking at it closely I count 6 or more pins that are like that.
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Offline AmmoJammo

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Re: ACA 500 not booting
« Reply #12 on: January 12, 2014, 09:53:37 AM »
If it hasn't wicked through, its probably because there's a ground plane on the top layer, or even on an internal layer.

So most times, simply reheating it, and even adding more flux to the top side won't help, unless you're using a hotter/higher wattage iron, or applying the heat for longer.

Its not impossible that the through hole plating is missing... but have a closer look at the top side to see if all the pins that didn't wet through are on the ground plane ;)
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Offline ChartusTopic starter

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Re: ACA 500 not booting
« Reply #13 on: January 12, 2014, 10:07:26 AM »
I think I might want to skip that.  Thats how I got into trouble with my A600.  I got it working again but its not pretty
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Offline AmmoJammo

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Re: ACA 500 not booting
« Reply #14 on: January 12, 2014, 10:09:18 AM »
pics? lol
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