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- AC adapter light flashes 4 times and nothing else happens

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05-04-2017 02:50 AM
Product: HP Elitebook 820 G1
Operating System: Microsoft Windows 10 (64-bit)
Hi,
my elitebook does not start anymore.
If I press the power button when the battery is inside, the working LED shows but after 2 seconds the AC apapter LED blinks once ornage. If the AC cable is plugged in the working LED shows up and again after 2 seconds the AC adapter LED blinks 4 times (white, orange, white, orange) and just the CAPS lock light blinks once. The latter is idependent from the battery, both ways tried.
I tried also a hard reset with removing everything and pressing the power button in order to release the last power.
It didn't help.
I didn't find any explanation for this particular blinkcode in the web.
I hope somebody can help. Thanks!

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