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HP and Compaq All-in-One and HP TouchSmart Desktop PCs - Screen is Blank after Starting the Computer

This document pertains to HP and Compaq All-in-One and HP TouchSmart Desktop PCs.
Perform the steps in this document to resolve an issue where a screen has power but does not display anything.
Remove any media from the floppy drives, CD/DVD drives, USB ports, and memory card reader slots, and disconnect all non-essential devices (printers, scanners, external hard drives, and similar). Leave only the keyboard and mouse connected to the computer.
With the devices disconnected, restart the computer. If the screen now displays a picture and Windows starts properly, a device is preventing the computer from starting. See Updating the BIOS to resolve this issue.
If the screen does not display a picture or Windows does not start properly, select one of the symptoms that most closely matches the condition of the computer:

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Country: United States

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