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My HP 255 8G computer suddenly stopped working yesterday. I turned off the laptop, and now the screen is black, and the Caps Lock key is flashing 5 long times and 3 short times. (The computer lights up and the fans are running.) I've tried disconnecting the battery, pressing the Windows and B buttons while booting, and other similar attempts. All to no avail. I've even tried downloading the BIOS from HP's website onto a USB drive.

Can anyone help?

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