Database Develop

Xperia Z Dead??

Hi.
So I deleted gmail apk and put inverted gmail apk in system apps. Powered off the phone. Tried to power it back on, nothing happens.
Battery was almost full, about 95%. If I hold power button (tried for like 30secs) nothing happens. No LED, no vibrate, screen is black non-stop.
I also tried power& VOL-, power& VOL+, power & both volume... Nothing.
If I plug it into USB cable from PC, nothing. If I plug in the mains charger, nothing.
Tried holding VOL- (and later VOL+) and plug in USB cable from PC to get into download mode, nothing. Flashtool doesn't see the device.
What the HELL just happened? And what can I do?

Sony update service
tipsek said:
Hi.
So I deleted gmail apk and put inverted gmail apk in system apps. Powered off the phone. Tried to power it back on, nothing happens.
Battery was almost full, about 95%. If I hold power button (tried for like 30secs) nothing happens. No LED, no vibrate, screen is black non-stop.
I also tried power& VOL-, power& VOL+, power & both volume... Nothing.
If I plug it into USB cable from PC, nothing. If I plug in the mains charger, nothing.
Tried holding VOL- (and later VOL+) and plug in USB cable from PC to get into download mode, nothing. Flashtool doesn't see the device.
What the HELL just happened? And what can I do?
Click to expand...
Click to collapse
JUST DOWNLOAD THE UPDATE SERVICE FROM SONY , CHOOSE YOUR DEVICE AND FOLLOW THE INSTRUCTION AND MAYBE IT WILL GET YOUR PHONE WORK .
UPDATE SERVICE LINK
http://www.sonymobile.com/gb/tools/update-service/

Tried Sony Update Service, also PC Companion and flashtool.. The phone appears to be completely dead, like the battery is empty or not even connected. I don't think it's possible that the battery is empty since it had 95% of power when I switched the phone off..
Now that I think about it, it might be possible, that I turned the phone off, didn't wait for it to vibrate and immediately tried to turn it back on.. Does this somehow put the phone in "hard off mode" or something? I mean I'm just guessing here, because I really have no idea what to do :crying:

Hold power button plus volume until u feel 3 vibrates either the phone will come back on or at least u should be able to connect it to the pc opinion.
Sent from my C6603 using xda app-developers app

dante501 said:
Hold power button plus volume until u feel 3 vibrates either the phone will come back on or at least u should be able to connect it to the pc opinion.
Sent from my C6603 using xda app-developers app
Click to expand...
Click to collapse
if your computer does not recognize your phone or vice versa your phone is hard brick (reinstall sony driver just to be sure), no other way to revive it unless you can get into recovery.

I had the same problem this morning. Itwas on charge overnight from the GPO and this morning, Nothing.
I tried two things. One was the update as suggested here (which is happening as I speak) and the other was to hold the button and the lower volume switch. I was doing these concurrently, with it plugged into my laptop and something worked. THANKFULLY.
I only got the phone about three weeks ago and this is the second time something like this has happened. First time it was totally dead and I had it swapped one for one. Worst part was I had spent some time updating my phone list etc which was subsequently lost (making me think I was working on my phone memory not the sim....)
I've just updated my NFC firmware, whatever that is, and it has gone into sleep mode. But at least it's working.
My longwinded explanation preceeds a short question.
Is this a common occurence with the Xperia Z?
My wife has exactly the same model only exception being hers is white, mine black. She has had no probs. Knew I shoulda gone the white one.

tipsek said:
Tried Sony Update Service, also PC Companion and flashtool.. The phone appears to be completely dead, like the battery is empty or not even connected. I don't think it's possible that the battery is empty since it had 95% of power when I switched the phone off..
Now that I think about it, it might be possible, that I turned the phone off, didn't wait for it to vibrate and immediately tried to turn it back on.. Does this somehow put the phone in "hard off mode" or something? I mean I'm just guessing here, because I really have no idea what to do :crying:
Click to expand...
Click to collapse
you have to wait at least 30 sec until you switch it on .leave the phone on the charger atleast for 3 hours try to uninstall and reinstall sony drivers . and then try to flash a stock rom using a flash tool

OK, the phone has been charging overnight (no led indication, charger was cold, so was the phone, so I doubt it's even been charging) about 10 hours. Reinstalled drivers, PC Companion, Update service and flashtool.
I tried these 4 options with 3 different variables (for 12 total combinations) 30 seconds each.
1) No cables connected
2) Mains charger connected
3) USB cable from PC connected:
hold [PWR] 30 secs
hold [PWR] + [VOL-] 30 secs
hold [PWR] + [VOL+] 30 secs
hold [PWR] + [VOL-] + [VOL+] 30 secs
After that, I also tried connecting the phone to USB cable to PC, each time with only 1 open program. First with flastool, then PC Companion, then Update Service with 3 different variables (for a total of 9 combinations). 30 seconds each:
without pressing/holding any buttons
hold [VOL+] while connecting
hold [VOL-] while connecting
Also tried a different USB port and cable, but it's 100% not the PC/drivers/USB cable.
No matter what I tried, nothing happened. Screen on the phone is dead all the time, LED light is dead, no vibrations, no sounds, nothing. Also when trying the PC connected options, no sounds, indications of drivers installing/failing, no activity in my computer, NOTHING on PC.
Are there any more options to try? Or must I send the phone in for repair?
And once again, does anyone know if turning off the phone and NOT waiting for it to vibrate and immediatelly trying to turn it back ON, somehow causes this "dead phone"?

No more ideas? Am I the first one to have this issue?

tipsek said:
No more ideas? Am I the first one to have this issue?
Click to expand...
Click to collapse
Seems like you have tried every known possible way to revive it, I think its time you sent it to Sony to have it fixed... I doubt anyone else can help you from here... Good luck.
Sent from my GT-N7100 using xda premium

I'm afraid to send it because I rooted the phone and my country service centres are known to deny warranty repairs for pretty much any reason they can find.. Sometimes they even make up something.. That's why I was hoping I could somehow fix it.. But yeah, seems there is no way I can do it, so I will have to send it in. Will report what happened.

To be fair, if it wont show on computer or boot up, short of them fixing it then checking, there is no way for them to see it has been rooted?
Xperia Z

That should be correct, but thats exactly what im afraid of. Lets say the battery died for instance. They replace it boot up the phone see its rooted and send me a bill. I hope this wont happen, we shall see..

tipsek said:
That should be correct, but thats exactly what im afraid of. Lets say the battery died for instance. They replace it boot up the phone see its rooted and send me a bill. I hope this wont happen, we shall see..
Click to expand...
Click to collapse
Pff, you think technicians are gonna bother opening superuser app to check for root?

I sure hope they wont. Phone has been picked up by delivery service today, that means it will arrive in repair centre by friday, and that means they will start looking at it next week maybe wednesday. Then before they figure out whats wrong, order parts and all, about 2-3 weeks and I can report what was wrong.

Got the phone back today. No idea what they did, no detailed description only "reset of program module SL4". Anyways, phone is working, I didn't have to pay anything, so all is good!:angel:

[Q] Bricked SP

Hi everyone.
My SP doesn't want to turn on anymore for a unknown reason. When plugging it to the pc\charger the red led appears and then disappears. Non of the tips (power + vol. plus, power + vol. minus) doesn't work.
Please, help. If your suggestion will help, I'll pay you.

put it into charger and leave it charging for like 1-2 hours, also remove sim and sd card

tr0llica said:
put it into charger and leave it charging for like 1-2 hours, also remove sim and sd card
Click to expand...
Click to collapse
It was on the charger all night long (with no sim and sd) and nothing. But now there is no red light.

Take it back to the shop
Sent from my C5303 using Tapatalk 4 Beta

are u setup driver for your computer to connect with phone

technaudio said:
Take it back to the shop
Click to expand...
Click to collapse
Not for me, unfortunately.
seper123 said:
are u setup driver for your computer to connect with phone
Click to expand...
Click to collapse
nope, because PC see nothing - nothing happens when plug in.

setup driver for flashtool in flashtool/driver remember to tick all
did it work??

How Did This Happen
suvalex said:
Hi everyone.
My SP doesn't want to turn on anymore for a unknown reason. When plugging it to the pc\charger the red led appears and then disappears. Non of the tips (power + vol. plus, power + vol. minus) doesn't work.
Please, help. If your suggestion will help, I'll pay you.
Click to expand...
Click to collapse
How did this happen?? Try this pull out the back panel and press the reset button with a pin and hold the power button and see what happens
Also you may try this install Sony PC companion This will install all the correct drivers for the phone then take usb cord Holding volume Down And Plug it to the phone. If all goes well the led at the bottom should glow green

I had a similar issue and after 4 days of trying all what i could find out in XDA for bricked Xperia phones my SP is back alive.
For me it happened during flashing (with Flashtool 0.9.11) the stock firmware .257 with to less battery power.
Short Info to my phone when it happened
Sony Xperia SP C5303
Kernel: Dooms v01 (i do not think that this was the problem!)
Bootloader: unlocked
Stock firmware from C5302 version .284
System: deodexed and rooted
When i say flashing i did it always with flashtool because PC Companion and SUS did not recognize my phone at all (with locked bootloader).
My SP was behaving as following.
- When i put the wall charger on the phone nothing happened no lights nothing same if plugged in to the computer.
- If i pressed the power button unconnected the LED flashed red 3 times all the time,
after a while nothing happened anymore (which gave me the indication that the battery is completely empty)
- If i pressed the power button continuous during charging (wall/computer) the red light turned on until i released the power button.
When pressing the Power button long enough during i was connected to the computer the green light turned on and i was in flash mode.
But only for maximum 2 min. This was enough to flash all firmware parts except the system.sin (at ~80 % phone disconnected).
And this was the problem my SP stayed dead.
Before someone asks, standard connecting while pressing the volume down for flash mode or volume up for fastboot mode didn't work.
Now i tryed all:
- Left the phone on the wall charger without doing anything -> nothing
- Left the phone on the computer without doing anything -> nothing
- Left the phone on the wall charger/computer while pressing the power button continuous (did it with a tape) -> nothing except that it went in flash mode and red light again all the time
Now my last try (i was reading this in an X10 thread):
I plugged the phone more than 7 hours to the computer while pressing the volume down button continuously (again taped).
Next morning it first looked like that this also did not work.
But as i disconnected the phone from the computer and plugged in again the red light stayed on.
Ok give it a try i thought and i put the phone to my wall charger for 1 hour or so also here the red light was glowing continuous now.
And yeah i could connect the phone to the computer in the normal way volume down than usb and i was in flash mode.
I was now able to flash the complete stock firmware. After again putting the phone to the wall charger for 1 hour the system was booting :victory: .
And now i saw the problem battery charge in status bar showed 1 % but the firmware start up check showed 55 % .
I remember that i did wipe the battery stats in recovery before all that happened.
No idea if this caused the problem.
However i could now charge my phone and it is still alive relocked and on stock.
Hope this helped and good luck.

To prevent other people from this bad situation i tried to remember exactly what caused the drain of the battery to 0%.
Battery was on 25% at start. (I know this was stupid, i was too impatient as dooms v16 and cwm for locked bootloaders were released :silly
1.I started with trying to update my mobile to stock with PC Companion and SUS,
without thinking about that this will not work with unlocked bootloader. -> first battery drain
2. Got stock FTF for .257 (c5303) and wanted to flash it which did not work got errors always.
My SP was connected flashmode on my notebook a long time while i was trying to fix that (reading XDA, driver config etc).
Several times tried to flash without success.
-> drain, drain and more battery drain not thinking about that i started with only 25%.
3. Gave up on my notebook and connected my phone to the Desktop PC (here the config was ok i knew that from flashing before on that computer).
Meanwhile i assume that my battery was already close to completely empty.
As the flash of the FTF (all parts) started my phone turned off and was "dead", i do not remember on which sin it turned off.
The whole time 1. 2. 3. i never booted i always stayed disconnected or in flashmode.
And than the mess began which i posted in my previous post.

So my SP is officially dead. Need to replace to motherboard.

THIS HAPPEND TO ME TRY PRESSING THE BUTTON BEHIND THE PANEL
WORKED FOR ME
Sent from my C5303 using xda app-developers app

ykdr-scott said:
THIS HAPPEND TO ME TRY PRESSING THE BUTTON BEHIND THE PANEL
WORKED FOR ME
Sent from my C5303 using xda app-developers app
Click to expand...
Click to collapse
lucky for you,dude...it does'nt work on mine..
anyway,how long you keep presing the button?

Chena_22 said:
lucky for you,dude...it does'nt work on mine..
anyway,how long you keep presing the button?
Click to expand...
Click to collapse
You should keep pressing that button till your phone's screen goes black and vibrates 3 times if it doesn't do that then either the mobo is dead or the button is broken!
well... that's why I kinda hate sony why not do like most makes do (Like iphone, htc, samsung etc just long press the power button to reset the damn thing! It gets really annoying to keep pulling my case and back cover off and then putting a pencil in that tiny hole in public :/)

noahvt said:
You should keep pressing that button till your phone's screen goes black and vibrates 3 times if it doesn't do that then either the mobo is dead or the button is broken!
well... that's why I kinda hate sony why not do like most makes do (Like iphone, htc, samsung etc just long press the power button to reset the damn thing! It gets really annoying to keep pulling my case and back cover off and then putting a pencil in that tiny hole in public :/)
Click to expand...
Click to collapse
well that's a shame for sony then....
but,my xsp is already dead now...even i try hard to revive it....

Please let me know!!
Ehardt said:
I had a similar issue and after 4 days of trying all what i could find out in XDA for bricked Xperia phones my SP is back alive.
For me it happened during flashing (with Flashtool 0.9.11) the stock firmware .257 with to less battery power.
Short Info to my phone when it happened
Sony Xperia SP C5303
Kernel: Dooms v01 (i do not think that this was the problem!)
Bootloader: unlocked
Stock firmware from C5302 version .284
System: deodexed and rooted
When i say flashing i did it always with flashtool because PC Companion and SUS did not recognize my phone at all (with locked bootloader).
My SP was behaving as following.
- When i put the wall charger on the phone nothing happened no lights nothing same if plugged in to the computer.
- If i pressed the power button unconnected the LED flashed red 3 times all the time,
after a while nothing happened anymore (which gave me the indication that the battery is completely empty)
- If i pressed the power button continuous during charging (wall/computer) the red light turned on until i released the power button.
When pressing the Power button long enough during i was connected to the computer the green light turned on and i was in flash mode.
But only for maximum 2 min. This was enough to flash all firmware parts except the system.sin (at ~80 % phone disconnected).
And this was the problem my SP stayed dead.
Before someone asks, standard connecting while pressing the volume down for flash mode or volume up for fastboot mode didn't work.
Now i tryed all:
- Left the phone on the wall charger without doing anything -> nothing
- Left the phone on the computer without doing anything -> nothing
- Left the phone on the wall charger/computer while pressing the power button continuous (did it with a tape) -> nothing except that it went in flash mode and red light again all the time
Now my last try (i was reading this in an X10 thread):
I plugged the phone more than 7 hours to the computer while pressing the volume down button continuously (again taped).
Next morning it first looked like that this also did not work.
But as i disconnected the phone from the computer and plugged in again the red light stayed on.
Ok give it a try i thought and i put the phone to my wall charger for 1 hour or so also here the red light was glowing continuous now.
And yeah i could connect the phone to the computer in the normal way volume down than usb and i was in flash mode.
I was now able to flash the complete stock firmware. After again putting the phone to the wall charger for 1 hour the system was booting :victory: .
And now i saw the problem battery charge in status bar showed 1 % but the firmware start up check showed 55 % .
I remember that i did wipe the battery stats in recovery before all that happened.
No idea if this caused the problem.
However i could now charge my phone and it is still alive relocked and on stock.
Hope this helped and good luck.
Click to expand...
Click to collapse
What is those time period for doing anything nothing?|||???? please mention about times....for each:
- How many Time........You.....Left the phone on the wall charger without doing anything -> nothing>??
- How many Time........You.....Left the phone on the computer without doing anything -> nothing?>?
- How many Time........You.....Left the phone on the wall charger/computer while pressing the power button continuous (did it with a tape) -> nothing except that it went in flash mode and red light again all the time>??>?
also
Now my last try (i was reading this in an X10 thread):
I plugged the phone more than 7 hours to the computer while pressing the volume down button continuously (again taped).
(WITH FLASHTOOL READY WITH .TFT KERNEL FILE)>>>????
Next morning it first looked like that this also did not work.
But as i disconnected the phone from the computer and plugged in again the red light stayed on. (WITH FLASHTOOL READY WITH KERNEL TFT FILE)>>>????
Ok give it a try i thought and i put the phone to my wall charger for 1 hour or so also here the red light was glowing continuous now.
thnx
please let me know, mate!!

watch?v=daNue2RsUbY ( video of my phone with the fading logo )
had the same problem with mines ( i manage to record this fading logo part )
hours later after the record my phone won't even turn on and it only shows that red light popping up when i press the power button
i brought it to sony's service center here and they replaced the battery, that managed to fix it <3

For me pressing the back off button and volume + button force it to fastboot mode. From there just flash a kernel and it is fixed.

which kernel???

Xperia Z not powering on

Hi i have a sony xperia z that just doesn't want to power on when it's plugged into the charge the red led appears however that red led goes off after it's been in the charge in around half an hour of it charging it doesn't get recognised by the pc by flashtool or sus or pc companion not any hard reset or any of that work such as vol up + power and vol down + power or vol up + plugging usb in even if i hold the buttons for around 5 minute nothing happens, this phone isn't water damaged as all the indicators are white

Connect to pc's usb and leave it for some times.
And maybe you can explain more what you was doing before it happens like this.

i have connected to the pc and i also left it for more then an hour just when i first connect it to the pc it has a red led but later on that red led comes off and i honestly don't know i bought this phone in this state

I had the phone connected to the pc and that red led went off for a bit then it came back on

Are you using the original charger?
Sent from my C6603 using xda premium

yes i tried multiple chargers aswell

i heard about dead xperias without reasons(in most of cases they turned off the phone and it never turn on again) maybe is better if you take it to a centre

Could it be the battery by any chance

bump

Help?

hold down the volume up and power button for 10 seconds, it reboots the phone
let me no if it works

Try what Andy194 said. Falling that try speaking to Sony themselves. Mine did that and they offered me a warranty replacement. Luckily the problem solved itself. As I was about to put it back in its box and send it off, it suddenly booted up fine, on its own.
Sent from my C6603 on Three

My Z refused to charge when it was on 1%, as if its conntact with usb cable is not working well, happened once already but it returned to normal. So I decided to turn it off as it would turn itself off anyway. Plugged it in, but it didn't work. Used my Arc's cable and the red led light came up. I waited a bit for the phone to boot up to get to the charging animation, but nothing happened so I plugged it out and to my surprise the red light didn't go off and I can't do anything to turn it on. The phone is just rooted to 4.2.2, BL is locked.
Sent from my charming GB powered Xperia Arc
Edit: left it plugged in my laptop and after 15 minutes or so it powered up. Yay T-T

Dead xperia T

Well my GF had a lot of trouble with this phone, we replaced the battery 3 times due to them failing. Anyway I updated it to official 4.3 for her and left it totally stock, no root or anything. All was well for a few days. One night we left it charging, when we woke up it was still pretty dead. She used it for about 5 mins then it died, now it won't charge or switch on! Got it charging offline but still didn't take any juice. Flashed in flashmode several times, now if I connect to anything it goes straight into flashmode and still won't charge! I bought her a galaxy s2 for now but is there anything we can do? Is it possible it needs yet another new battery?
Just to add I tried all the fixes such as leave it on charge, remove battery, button combo etc. When it does "charge" it doesn't take any charge
Sent while my supervisor wasn't looking

Try replacing the battery again and if this happens again it is definitely a hardware problem
Sent from my EndeavorU using XDA Premium 4 mobile app

I don't want to start a new thread, so I will post it here. My Xperia T is a dead phone in the moment and I was searching the web and of course xda to find a fix (like for Xperia Z).
How it happened: Yesterday my phone was working like a charm with CM11. I wanted to sell it and so I was trying to flash a stock rom. The flashing aborted with error every single time (Processing system.sin). I was able to flash all the .sin except for system.sin
After the phone was a soft brick I could enter fastboot/flashmode and flash the kernel from CM11 and install it without any problems.
I tried several times to flash stock until my phone bricked. Now it is charging and nothing happens, no fastboot, no flashmode, no sign of life. Only when the battery is detached the LED flashes one time (red) when cable is connected
Edit: The phone was able to go in flashmode but after few seconds it disconnected, in reconnected in flashmode. Also the phone is now recognized by the computer as "qhsusb-dload"
Edit Update: When I connect the phone to the computer an press Vol+ and Power Button for a longer time, the LED turn on (red color) and the qhsusb-dload disappears from device manager. After 2-3 seconds the LED turns of and the device manager shows qhsusb-dload again.
Now I have connected the phone to wall charger with a rubber band on the power button and sometimes the red LED turns on and stays for a few seconds

Dead z1 :(

It seems that my z1 has just given up on life.
I was checking my gmail and the phone switched off. It wouldn't switch on so I tried vol-up and power, it vibrated but did nothing.
Now absolutely nothing will make it show any signs of life, it seems to be completely dead which is weird. No LEDs or vibrations at all, so I guess I'll be returning it :crying:

Dude you ran out of battery. Try to recharge it.

albertobom said:
Dude you ran out of battery. Try to recharge it.
Click to expand...
Click to collapse
I was on 80%! Strangely enough however, the vibration is back when I press vol-up and power. Still no display though.

declan8888 said:
I was on 80%! Strangely enough however, the vibration is back when I press vol-up and power. Still no display though.
Click to expand...
Click to collapse
Now, seriously, try to flash your kernel again.

albertobom said:
Now, seriously, try to flash your kernel again.
Click to expand...
Click to collapse
Flashtool doesn't recognise my phone. The only sign of life is the 3 vibrates when I hold vol-up & power

declan8888 said:
Flashtool doesn't recognise my phone. The only sign of life is the 3 vibrates when I hold vol-up & power
Click to expand...
Click to collapse
That's odd... Well sent it to Sony.

Guess I'm gonna have to

Even mine was dead for sometime today
Even my phone gave me a shock today... Screen switched off and the phone was not responding.... had to reset it through the sim tray!

I get 3 vibrations when holding the reset button next to the SIM tray, but nothing else.

Strange. Vol down and power would reset the phone?
Sent from my C6903 using XDA Free mobile app

Use Seus or PC companion to repair.
Or a flash a recent. ftf by flashtool.
Sent by my Z1 with XDA Fax

Duvel999 said:
Use Seus or PC companion to repair.
Or a flash a tft .
Sent by my Z1 with XDA Fax
Click to expand...
Click to collapse
PC Isn't recognising that it's connected.
I've contacted the ebay seller I bought it from last week regarding a refund or replacement. Should get a reply tomorrow.

declan8888 said:
I was on 80%! Strangely enough however, the vibration is back when I press vol-up and power. Still no display though.
Click to expand...
Click to collapse
I had the same issue your having with my rooted Samsung s4. I couldn't get anything. Bought secondary battery... Son took into verizon came on briefly. My programming USB cable rusted out, had to buy a new jib. That didn't work. I just persevered, I found life when I put in the battery and started hitting the power button repeatedly, 15-20 times
Finally it would turn on, used the jib got it into download mode and flashed the ROM with odin again. Still had some issues so I did a reset then re flashed again, re rooted and started loading programs.
Still not sure if it was/is the power button or system change I made with exposed or other such toolت.
Also now using button savior as a preventative measure. As an added bonus I have 3 batteries and a stand alone battery charger.
Please update your thread as status changes. Hope you get it working.
ヅ Droidatar
(knows just enuf to brick it)
Rooted S4 MDK I545 stock 4.2.2
"If someone helps, never forget to hit thanks ? "

my z1 2 hours ago had died, I solved by connecting it to flashtool with the volume down pressed. I have version .157

I would think faulty battery, had same issue with old s2

No idea what the problem could be, perhaps moisture got into the headphone jack or something and made its way into the phone.
As I said, when I help vol+ and power it would vibrate 3 times to indicate power off however it would show no signs of life when turning it on.
Flashtool wouldn't recognise it nor would PC Companion.
I sent it away to Sony to repair last week - it's currently still with the technician. I'll update the thread as the repair progresses to let you know the outcome! Hopefully it will be a manufacturing error and I won't have to pay for a repair.

I recognize this problem in a slightly different form.
When my battery is completely dead and I try to charge it and turn it on it won't. It gives me the same three vibrations. I let it charge on the fast charger the whole night. Nothing. (0% charge, light stays red all night long.)
Then I reset it (red dot next to SIMtray) (which does nothing, no vibrations) but it works if not connected to the charger (it only vibrates then)
After reset I try to charge it and it goes automatically on but when it goes on it stops charging after splash screen and turns off and stops charging.
Then it's just trial and error. Reset, no reset, manual turn on, turn off, reset with USB connected, without and eventually it charges and I can turn it on.
After that it works fine.