How easy is it to damage an IBM CGA display?

[Michael B. Brutman]

Jim Leonard wrote:
> Michael B. Brutman wrote:
>>
>> NCSA Telnet *was* running on before I put the CGA card in.  (I had a 
>> Cirrus Logic VGA card in it yesterday.)  Now NCSA Telnet is hanging on 
>> startup after reading it's config file.  
> 
> Check the config file; there is a video mode line IIRC.

Been there ..

Other people have reported weirdness with NCSA Telnet on an XT before. 
If I put the VGA card back in and it works, I'll have it narrowed down.