[mythtv-users] STEP 3 Destroy your TV

[Brian Wood]

On Feb 8, 2007, at 8:40 PM, David Brodbeck wrote:

> Brian Wood wrote:
>> That's a standard disclaimer for anything having to do with driving
>> monitors. It's been around since the first days of X.
>>
>> It's really not such a problem these days, any monitor so old and
>> crappy that it could be destroyed by incorrect timings probably
>> *should* be blown up.
>
> It also involves a failure mode that's specific to CRT monitors.  You
> can't blow up an LCD by driving it with an out-of-range signal as  
> far as
> I know.

Correct. Most CRT displays use a "flyback" type of high-voltage power  
supply where the horizontal scan frequency is stepped up by a  
transformer. Too high a frequency can saturate the core of the  
"flyback transformer" and cause other problems, up to and including  
smoke in the vicinity and an end to normal operations.