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HP Pavilion 27 Quantum Dot 27-inch Display

HP Pavilion Quantum Dot display working perfectly fine since purchase until today. Now when I connect it to power using the supplied cable as usual, no power light is visible on front of monitor. There is a small white light that becomes visible on the rear next to the where the power adapter is inserted which stays illuminated for approx 2 seconds, but then disappears. I've tried a different power cable but it's exactly the same behaviour. 

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