But in recovery menu, they work again.
Sounds like your Vita's software is damaged.
Backup all your data. Format the system to factory specs using the Settings app, then enter Recovery Menu then Rebuild Database.
This seems to be a software (rather than a hardware) issue. Rebuilding database should help it.
What do you expect people on a forum to be able to di? If it is a physical issue with the device Sony or the store you got it from are the ONLY people who can help, What does being in Vietnam have to do with anything? They have a mail system right?
Wow, how rude!
I'd like to start by apologizing for the rather unhelpful post above, it did offered nothing other than rudeness & inaccuracies & if someone can't be bothered to post something helpful I don't see why they bother at all!
Just for the record these Forums are full of many knowledgeable people who are only too wiling to help another person out, so the OP came to exactly the right place to ask their question, will the OP be taking the unit back to where it was first purchased?, possibly, but no, Sony are not the only people who can help, people here can too.
Like I said if you have nothing of any use to add to the discussion don't bother.
It's the truth, sorry, but sometimes the truth hurts. It's not rude, if your device is defective what can we do? Nothing. Your post was not helpfull take your own advice chump.
if your gonna be mean and not say anything helpful don't even bother commenting
People go to the forums for help and to have nice conversations with others, not for someone to harass them like you did
What is it with all these people trying to prove they're superior, like we cant post that, why would we post it? well people posted these thread so that other can help them, so what if they're Vietnamese, they're normal people, tch, people these day
And to the OP, sorry if i have to use Vietnamese here to talk, since from what i understand he cant speak proper english or even understand what your rudeness and truth are:
Bạn ơi bạn ở Hà nội hay Hồ chí minh vậy, mình là Việt Kiều mỹ, bạn nên cầm Vita đến tiệm sửa đi, xin lỗi tiếng việt mình ko tốt
Once again i'm sorry for using vietnamese, but please just be friendly instead of being a d-bager
PS stop proving really, it;s not your duty to act high and critize other, blah, blah blah
Tch have to be the hero here, sigh, i was hoping to not using any vietnamese or japanese when i'm on here but well, some really stupid people force me to. I wish we could like report them for being abusive and that would be nice