Huawei P8 Lite: Continuous On/Off Cycle, Unable to Hard Reset or Connect to Hisuite Program

Hello, I bought a used phone with a problem, namely it turns on, vibrates, then turns off and on again and again and again. Same under the charger. Hard reset cannot be done because the phone turns on and off all the time, after disconnecting the battery for a moment and pressing the hard reset buttons, the phone turns on and then turns off again and again. After connecting to the pc, it installs the drivers but after turning on the hisuite program (for uploading a new software) he does not see the phone.

First, measure the voltage of the battery.

There are several pins and I don't know which ones to choose but the battery is probably 50%

The voltage is measured in Volts, not%, try one by one and some two pins should show a voltage around 4V

Okay, I was able to measure. The battery is 3.66V.

So definitely not enough and you need to start by charging it to at least 4V

It takes about 4 hours to charge, but when the screen is on, it will charge and charge. Leave it under the charger overnight?

mateusiak wrote:

It has already been charged for about 4 hours

If the phone has a damaged soft, you will not charge the battery in it, you need to charge it externally.

Okay, I have a regulated power supply now with what voltage and with what current?
Or I also have a charger from a 18650 laptop battery.
What's better?

Added after 21 [minutes]:

The battery is now 3.73V.

I charged to 4V and still the same.

Hello. I would like to connect to the topic ..


I have a P8 lite ale-21 that keeps restarting over and over again. Telephone AFTER FLOODING.
Power ON Logo for 2-3sec. and restart.
The symptom is the same on the connected power and on the battery itself.

Battery charged to 4.08V externally.
He concludes that the phone does not see the battery at all.
POWER + VOL UP key combination - no option to enter recovery mode.

The phone has been dismantled from every possible metal casing, cleaned and washed in ultrasound.
In general, I did the basic treatments and measurements on the plate, but I am standing still because does not have a schematic I would very much like to ask for help if someone is in possession.
I am waiting for a new battery, it will not hurt to replace it and puk what will be suggested by your advice on the subject.

ps I also have the p8 model plays L-09 the same symptoms , the battery was replaced with a new one and still the same.
Thank you in advance for any interest and any suggestions and advice!

I gave it to the site and they repaired me for PLN 80 burned paths and capacitors near the jack.

Hello, which capacitors can be damaged or path? Maybe some diagram? I also have only the logo - bat replaced, LCD also, clean disc, software does not accept.

Check if the Power button is short-circuited - it has the second function of a reset by holding it for 10 seconds, if it is always shorted, the phone will fall into a reset loop with any power source.

Well, unfortunately, my tape with the switch is unfastened and still bootloop. Man, I don't know how to go about it ...

it is not necessarily the fault of the tape - it may have a short circuit at the joint and without the tape it will also cause such effects. I gave a suggestion where to look for the reason if someone has basic knowledge of electronics, all you need is a meter in your hand and measure

The socket is clean, the elements at the hf connector are burned in, and the elements at the switch strip socket are burned in without any positive result.

Hello,
I join the topic, I have a Huawei S8-301L that keeps restarting all the time. The battery value is 4.2V, I can only enter the combination of buttons with power + vol down and the inscription device blocked is displayed. Any ideas?
Regards,

For me, it works all the time under the connected charger, when I unplug it, it restarts after a while and so on and on. The phone with water for the pool, but it was turned off immediately, after a few hours it was connected to the charger because the person forgot to flood. After turning on, it worked for a moment until the screen began to blink and the phone was turned off.

Do you think the battery has swollen? And it gets contained in it?

If the battery had swollen, you would have seen it because the housing would bulge. Probably the motherboard has gone.

But if the motherboard went off, it wouldn't turn on?

Not necessarily

First of all, each phone or anything else after being flooded should be dismantled and cleaned.
If there are further problems, then the stairs begin.