Laptop doen't power on if adaptor is unplug for more than an hour

Hi,

if I remove the power adapter for more than an hour and plug it back, the laptop takes for that 2 days to POWER ON

I left it in a quite humide environment POWER OFF for 3 months, mold accumulated on the Keyboard.

But when powered ON it works fine.

I have to leave the adapter plugged to the mains and plug to the laptop.

Thanks guiding me which component is defective requires replacement.

Alain

the laptop worked on adapter connected on mains without battery before this happened.