my laptop hdd and cpu fan keeps running without turning ON

Feb 14, 2018
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Hello,

im a local computer technician. recently i've encountered a customers laptop problem that he brought the laptop for harddisk replacement. when i simply replaced the hdd by knowing his words, i have faced this problem..

when i insert the battery into the laptop, the hdd and system fan runs automatically w/o pressing the power button.

when i press the power button the system boots up the OS
if not untill then the hdd and cpu fan always runs tills the battery charge finishes.
later i understood that the previous hdd was broken by this problem only..

Help!!