Re: Apple //e Upgrade Failed?

["Bryan Parkoff" <none@nospam.net>]

"Bryan Parkoff" <none@nospam.net> wrote in message 
news:1H4Nf.61744$PL5.37784@newssvr11.news.prodigy.com...
>    I have unenhanced Apple //e.  The model is A2S2064.  The serial number 
> is 1A2S2-D44 0HDK A2S2064.  I replaced from original video ROM chip to new 
> one which it includes MouseText, but it is still in unenhanced Apple //e. 
> It is working fine.
>    I tried to swap from 6502 CPU to 65C02 CPU while CD-EF ROM chips are 
> still unenhanced Apple //e, but it failed to work.  The screen is black 
> nothing.  Also, I tried another 65C02 CPU from Zip Chip to be installed. 
> It did not work and the screen is still black.  It works fine on Apple 
> II+.
>    Do you have a clue what it is causing?  If I get it working correctly, 
> I will swap CD-EF ROM later to be enhanced Apple //e.
>
> Bryan Parkoff
>
>
Hello,

    I want to thank you for all your help with feedback.  MPU socket had 
some bad contacts.  Now, it is working fine.  The upgrade is successful.

Bryan Parkoff