Try the usual. Canned air on the vents and if you are a repair tech, open it up and replace all heat sink compound.
LETHAL and DEADLY voltages are inside so you as the tech know what to do now.
I have one LCD ViewSonic - VA1703wb.
Suddenly it gets powered off while working. I have replaced the power cord 2-3 times but still the problem persists.
I think the problem might be with the monitor itself.
Please suggest, whether I need to try for some other solution or put it on a repair or atlast replace it with a new monitor.