LG Flatron W2043SE stuck in sleep mode

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I've had this monitor for a while and have had no issues with it until a few weeks ago, everytime I turn on my computer my main monitor turns on but when I log in the LG monitor stays in sleep, when I leave my computer on for a little while the monitor isn't plugged in the display starts flashing with LG logo and eventually fixes itself but that stopped working, I've been looking all over the internet and have not found a fix.