Latitude D610 External Video Blanking ATI X300

Reporting a problem, and solution;

I have a dell D610 with dock and 20" LCD external monitor, using
extended desktop so as to have two separate displays as one desktop,
ATI Mobility Radeon X300, could not figure this out, the external
display would blank out intermittently, try staring at a document and
then BLANK, finally traced it to the ATI X300 video in the Latitude
motherboard, Dell replaced the motherboard with an Intel video board
915G based. We have extended warranty on systems, but this seems to be
a defect of ATI, good luck.

This took me months to resolve the problem with much troubleshooting; I
have tons of hardware to troubleshoot, if you don't have that luxury
maybe this article will help.

The IT Avenger