Secondary Monitor Takes Forever To Turn On

[brandongaming33]

So randomly probably around a week ago I noticed my second monitor wasn't turning on, so I did the usual switching around cables, unplugging and plugging back in and such. I got it to turn on, but the probably persists. It seems it just needs like five minutes before it will turn on after my main display is on, especially when the monitors have been off for a while. I never had this issue before it started a week ago. It is a fairly old monitor, so it's possible it's just reaching the end of its life. Any ideas as it how I might be able to make this go away? I'm not sure the exact model, it's from LG's Flatron Wide line up though, and is a little lower in res than 1080p.