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Flag Post

No power, only 20 seconds of battery charge, blinking power and caps lock

HP Recommended
Elitebook 840

My computer was working fine. 

One time I was using it without the power cord. When it got to low battery, I plugged it in, but it would not charge.

I plugged in the cord and took it out, and plugged it in again, and then the battery charged and the power source worked.

The same problem happened the next day, but when I put the cord in and out it would not work.

I took out the battery, unplugged the power cord and all external devices, and then held down the power button for 20 seconds to reset the power.

When I plugged in the power cord (without the battery installed) the power button and caps lock flashed at regular intervals.

I could start the computer for about 20 seconds, then the battery would die.

 

The power cord works in another computer (so it is not the problem) and I have also used another power cord.

 

Thank you for your help!

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