Hacking Unlisted PSV boot keycombo

[SilicaAndPina2]

Hi guys i was bored and found this:
Turn off ur vita
Hold:
PS+select+L+powerbutton +start for 10-15 secs (screen will remain black)
Release
Boot normally vita
If it works: Instead of normall to-livearea it will ask you to set date and time (clock has been reseted)
I dont know what this keycombo do.
(I think it disconnect battery for a while)
Or just resets clock
UPDATE1: It seems that this keycombo disconnects battery for a while. The time of holding the combo may vary (try even 20secs) if the bootscreen appear (when holding combo) it means that the combo wasnt applied, try again.
UPDATE2:After keycombo (not reboot yet) it sends some packets/requests to pc (if connected) which are different from normal vita turned off

After boot it should ask for date time:
View attachment 90005

Maybe this will be helpful:
https://wiki.henkaku.xyz/vita/Boot_Sequence

if u do it on a testkit (only do on expired one! NOT ACTIVATED one) it says "Cannot find expiry date, set time via internet"..
i wonder what would happen if we spoofed timeservers to our own that says its like 1995? idk if that would work probably worth a try at some point.

anyway ive known about this for awhile, saw it on a testkit video where someone did it and it said "Cannot check expiry date"

 

[SKGleba]

if u do it on a testkit (only do on expired one! NOT ACTIVATED one) it says "Cannot find expiry date, set time via internet"..
i wonder what would happen if we spoofed timeservers to our own that says its like 1995? idk if that would work probably worth a try at some point.

anyway ive known about this for awhile, saw it on a testkit video where someone did it and it said "Cannot check expiry date"

Oo Interesting.. Yeah its normal it wants to set via net(trusted source)
If u spoof date it wont do nothing (maybe crash¿?) cuz the [LastActivityDate] was i.e 17.06.2017 and suddently is 2015.
So if i want to travel in time with my testkit vita i will get crashes. [Thats why 3DS is better]
And wat video? (I searched the web for dis keycombo before creating thread)
Gonna test it on testkit

 

[coderx3]

gud stuff

 

[seany1990]

Sorry for the necro but i think this thread can really help my issue but i just need something confirmed first
Does this have any negative repercussions for enso / sd2vita users?

 

[Gamer90Kirby]

Sorry for the necro but i think this thread can really help my issue but i just need something confirmed first
Does this have any negative repercussions for enso / sd2vita users?

Did you ever find an answer to this?
I need to do this because my Vita gives battery warnings at 50%!!!
I'm worried about my SD2Vita though

 

[Kazuto_Zed]

It's safe, always did this