then...the layout was probably not correct.  First review the gerbers...or troubleshoot the board.  Did you hook up power to the chip?  decouple caps need to be as close as possible, the lower the frequency of the design, the less importance that is.  If your running at 800Mhz and the cap placement isnt optimal, its essentially non-effective at that frequency.  There is an entire science devoted to signal integrity.  But if its slow, then stick them near.....
 
Course his problem could have been a cold solder as well.....

Sam <pic@amusementcity.com> wrote:
I soldered out that component ( CS8900A ) and soldered it to another board and
it worked as it should.

Regards,
Sam

P.S. Schematic capture of both boards was exactly the same but layout was
different.

Quoting Howard Winter :

> Sam,
>
> On Thu, 29 Sep 2005 15:04:48 +0100, pic@amusementcity.com wrote:
>
>> Recently I designed a board and sent it away to manufacture.
>> After it was soldered I discovered that not all components work.
>>
>> Do you know any "good" literature about designing PCBs?
>
> I'm confused - why do you think that non-working components is 
> related to PCB design?
>
> Cheers,
>
>
> Howard Winter
> St.Albans, England
>
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
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