[Coco] Coco SDC troubleshooting: no ROM found

[Zippster]

I would still wipe down the plcc contacts with iso, especially the flash socket,
it doesn’t take much to interfere with it.  After defluxing, there can be a
thin film you can’t even see.

I’ve had to do this many times even after an iso bath with no visible
residue - same symptoms.

- Ed


> On Nov 28, 2014, at 10:32 AM, Richard Goedeken <Richard at fascinationsoftware.com> wrote:
> 
> I actually used flux remover after I soldered everything on the board, but
> before I installed the chips.  I spray just a little bit and then rub it
> around with a toothbrush and then spray some more to blow off all the residue.
> It was very clean.
> 
> I'm sure that the card edge fingers are clean too; I only plugged this into
> slot 4 of an MPI that works with everything else that I've used (FD-501, other
> Coco SDCs).
> 
> Richard
> 
> On 11/28/2014 06:38 AM, Zippster wrote:
>> Hi Richard,
>> 
>> Definitely sounds like a contact problem.
>> 
>> How did you clean the flux off of the bard after
>> you built it? (if you did)
>> 
>> Likely some flux or other residue interfering.
>> 
>> Try taking a Q-tip soaked in isopropyl alcohol (91%) and clean
>> all the contacts in the PLCC sockets, as well as the card edge
>> connector and re-seat the chips.
>> 
>> - Ed
>> 
> 
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