Why laptop doesn't start up anymore?

It is a Medion laptop that I have not used for a long time. C.a half a year. The still image has been there for over 10 minutes.

See attachement

Then just wait.

I would still wait. 10 minutes is not long for a laptop that has not been used for half a year.

Battery out

If the loading symbol no longer turns then switch it off again

if not then you can try it out-on

maybe it just hung up

I would start safe mode.

https://support.microsoft.com/...-safe-mode

Or:

https://praxistipps.chip.de/...rten_40021