This is my dell monitor. After turning on the power button the screen would go blank after a couple seconds and the power light would stay on. I searched the problem online and found out it was the inverter on the power board. I found a new power board on eBay and replaced it in this video. Sorry it was so bright but I accidentally had the camera set to night shot lol. Hope this video helps you to repair yours. Thumbs up if it did. Peace
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DELL monitor 1907FPt repair inverter power board