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‎06-09-2026 05:07 PM

HP Recommended

I have a Probook 454s. Product #A1C68AV. The Serial # 2CE23921GR but when I try to add that product to my profile, it doesn’t recognize the serial number as being valid. My OS is Windows 7.
Issue: My screen went black when I was using it. I wasn’t plugged in, so I thought the battery died. I plugged in the charger & turned it on, but the screen is still black. I unplugged it, removed the battery, & pressed the power button for 30 seconds. I then plugged in the charger & turned it on, but the screen was still black. I repeated everything but also put the battery back in, but I still have a black screen. The caps

lock is blinking - continuous, short blinks - no variation - just keeps blinking. 

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