HP Elitebook 840 G5 - Not power on - keyboard blinks - Ne pali se - blica tastatura

My friend try to power on laptop after a while and only he see is keyboard blinks 2 times and that is it. After some inspection I realised that battery is totally empty (laptop is working fine with disconnected battery) so I just "re-alive" the battery with my bench power supply and after that all was fine.
Please, this video is for entertainment only, to not try anything from the video if you do not know what are you doing. Leave the job to skilled person.
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Moj prijatelj je pokušao da uključi laptop nakon nekog vremena i prilikom uključivanja samo tastatura zatreperi 2 puta i to je to. Posle provere, shvatio sam da je baterija potpuno prazna (laptop radi dobro sa raskačenom baterijom) pa sam samo "oživeo" bateriju sa svojim lab napajanjem i nakon toga je sve bilo u redu.
Molim vas, ovaj video je samo za zabavu, a da ne pokušavate ništa sa snimka ako ne znate šta radite. Posao prepustite stručnoj osobi).
Sva prava zadržana.