Help! System crashes and locks up.

[Dennis Wicks <wix@mgssub.com>]

Greetings;

I have a system I just put together. New pwr sup, mobo, and 
1 new SATA disk, 1TB. 2Gig memory. Processor is a Phenom 
9950 4 core. Running Deb 8.3.0 Jessie, new install.

Every so often it crashes and locks up, and the monitor 
screen has many narrow horizontal lines, mostly the 
background color.

When it crashes only reset and power off will work. I have 
looked in every log file I can think of and no luck.

Does this sound familiar to anybody? Any hints?

Any help at all greatly appreciated!!

TNX,
Dennis