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I am having an hp 550.
It has suddenly become inoperative as when I on the laptop nothing is shown ..no logo ..nothing is visible ..what may the problem?

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Posts
47367
Registration date
Monday February 1, 2010
Status
Moderator
Last seen
September 1, 2021
11,264
Try this

1. Remove the battery and cable.

2. Press and hold the power button for 58 seconds.

3. Replug and start.

Good luck