Resolving Start Up and No Boot Problems Checklist
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... assistance. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at the notebook, contact HP for the LEDs to original condition. If computer does not start Count number of blinking LEDs or beeping tones to help with diagnostics testing... device conflict or failure. Connect an external monitor to check display Remove all CD/DVDs, SD cards, USB devices, peripherals and do hard reset If memory or hard drive components were replaced, reinstall original components Remove memory modules and replace one-at-a-time If possible, boot to BIOS ...
... assistance. Disconnect the AC power adapter, remove the battery, and then press and hold the power button for at the notebook, contact HP for the LEDs to original condition. If computer does not start Count number of blinking LEDs or beeping tones to help with diagnostics testing... device conflict or failure. Connect an external monitor to check display Remove all CD/DVDs, SD cards, USB devices, peripherals and do hard reset If memory or hard drive components were replaced, reinstall original components Remove memory modules and replace one-at-a-time If possible, boot to BIOS ...