Fixing an LCD monitor - stays on for two seconds

If this is off topic please move it to the right board. So I had an off brand LCD monitor whose manufacturing date is unknown to me, lets say its 5 years old. It would turn on for several seconds and then shut off. I read up a little and found a trick to reduce the brightness. Working with a menu for two seconds at a time is tricky, but I eventually notched the brightness down to zero and...