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Black internal display on HP Pavilion with AMD A10-7300 APU with Radeon R6 Graphics

Question asked by waynew on Dec 30, 2018

Recently received an HP laptop running Windows 10. Internal display was black but seconary display using HDMI connection is fine. I reloaded BIOS and graphics drivers from HP. Restored Windows 10 to original status with no change. I then replaced the display screen with no improvement. I than downloaded drivers directly from AMD using their auto detect process. Still no change.  Neither Windows Device Manager nor AMD Catalyst software can detect the internal display. I get a Code 45 hardware device not connected to computer. Is the motherborad bad. Could it be a driver or BIOS problem? I have searched online extensively. Any solutions come to mind?