What does blinking power light of a laptop indicate?
Matthew Martinez 
Today i connected my laptop to its power adapter (which has been down for past few weeks due to hdd failure) to charge it before i could change the drive.
When i turn on the AC power, the power light on the front panel goes solid bright for a few seconds then starts blinking. I know my battery was 63% damaged before laptop crashed but it worked fine.
I read a hard reset after detaching the battery would solve it but to no avail.
I have HP DV4-2126TX 1
1 Answer
Most likely cause for blinking is that the laptop is turned on and in standby or similar.
... but it is different on every laptop.
Sometimes it means that it's charging the battery.
Sometimes blinking lights might even indicate a hardware failure (for instance, a failed battery, or damaged motherboard, or some other issue).
You would have to reference your laptop's user manual for more information on how to interpret these lights. There is no standardized method of using indicator lights, especially in laptops.
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