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Lenovo PhonesK8 [XT1902] Smartphones
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07-31-2019

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Re: K8 Note Switch off Automatically

2019-08-05, 5:50 AM

Hello @Agent_Rich

 

1. Are you suggesting to change the battery to fix this issue?
2. Is this the recommended solution from Lenovo to solve this automatic switch off problem?

3. If it is please suggest an original battery to replace it ? please share a link to buy the battery. I dont have a lenovo service center in my town.

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9746 Posts

03-05-2018

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Re: K8 Note Switch off Automatically

2019-08-05, 15:38 PM

Hi sree001,

 

Thanks for your question. The phone has a non-removable battery, I won't recommend doing as far as that suggestion, especially if you'll do it on your own. Try troubleshooting the software first. I recommend trying the Lenovo Smart Assistant - LMSA tool and see if it will help repair the phone. Here' s the link.  If you need instruction, here's the link

 

Best regards,
Rich
Motorola-Lenovo Support



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4 Posts

07-31-2019

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Re: K8 Note Switch off Automatically

2019-08-06, 6:30 AM
I am not replacing it myself. I will take it to a service center. But I want to make sure it is the issue of the battery before replacing it. So are you suggesting that it is a software issue ?

Does discharging the battery completely works for this issue ?
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71 Posts

08-28-2019

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Re: K8 Note Switch off Automatically - SOLVED BAKE THE MOTHERBOARD

2019-08-29, 5:05 AM
SOLVED SOLVED SOLVED
SUCCESS SUCCESS SUCCESS
IT IS 100% WORKING NOW, THE PROBLEM OF RESTARTING AND BOOT LOOP HAS GONE COMPLETELY!
To all of my fellow Lenovo K8 note users if you are facing with the problem of boot loop, freezing and constant restarting of your phone then its the problem with the motherboard and not the Oreo update. Yesterday i was able to used the phone temporarily by cooling it in the refrigerator that gave me the hint that there is some loose connection or dry solder due to which the phone was not working. Mainly this loose connection must have happened due to over heating of Media Tek X23 CPU. 
So i decided to do the re-balding soldering of the motherboard. Now the right way to do it is using the Hot Air Station, but if you don't have it then you can even bake the motherboard in oven. Follow the steps below
1) Carefully open the back and disconnect the flex cables for Battery, volume button, LCD and Daughter USB charge boards (Watch some YouTube Videos Online)
2) Unscrew the Motherboard and take it out from the casing. 
3) Remove the metal shields covering the CPU, there will be 4 shields but only 2 of them are removable, the other 2 are soldered to the motherboard so don't try to remove it if you don't have Hot Air Station.
4) Heat the IC underneath the shields with Hot Air Station, If you don't have Hot Air station then put the mother board on a ceramic or non conductive plate and then place it inside the Oven for Baking. !!!! WARNING DO NOT MICROWAVE IT !!!! You need to use the setting of your Oven similar to what you would use for Baking breads.
5) The Oven should be Pre-heated to 230 Celsius before you put the motherboard.
6) Set the timer to 10 to 15 minutes and let it bake 
7) Once the baking time is over, then let the Motherboard cool inside the oven until is cool to touch.
8) Put Heat sink compound on top of the IC/CPU and Metal Shield plates
9) Reassemble everything and test if it works.
10) Don't forget to give my reply a like if it works for you, All the Best!!!
I have attached some photos of the motherboard with some instructions on Lenovo Forum, Go to page 45 on the below link
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71 Posts

08-28-2019

US

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Re: My lenovo k8 note switch off automatically

2019-08-29, 5:07 AM
SOLVED SOLVED SOLVED
SUCCESS SUCCESS SUCCESS
IT IS 100% WORKING NOW, THE PROBLEM OF RESTARTING AND BOOT LOOP HAS GONE COMPLETELY!
To all of my fellow Lenovo K8 note users if you are facing with the problem of boot loop, freezing and constant restarting of your phone then its the problem with the motherboard and not the Oreo update. Yesterday i was able to used the phone temporarily by cooling it in the refrigerator that gave me the hint that there is some loose connection or dry solder due to which the phone was not working. Mainly this loose connection must have happened due to over heating of Media Tek X23 CPU. 
So i decided to do the re-balding soldering of the motherboard. Now the right way to do it is using the Hot Air Station, but if you don't have it then you can even bake the motherboard in oven. Follow the steps below
1) Carefully open the back and disconnect the flex cables for Battery, volume button, LCD and Daughter USB charge boards (Watch some YouTube Videos Online)
2) Unscrew the Motherboard and take it out from the casing. 
3) Remove the metal shields covering the CPU, there will be 4 shields but only 2 of them are removable, the other 2 are soldered to the motherboard so don't try to remove it if you don't have Hot Air Station.
4) Heat the IC underneath the shields with Hot Air Station, If you don't have Hot Air station then put the mother board on a ceramic or non conductive plate and then place it inside the Oven for Baking. !!!! WARNING DO NOT MICROWAVE IT !!!! You need to use the setting of your Oven similar to what you would use for Baking breads.
5) The Oven should be Pre-heated to 230 Celsius before you put the motherboard.
6) Set the timer to 10 to 15 minutes and let it bake 
7) Once the baking time is over, then let the Motherboard cool inside the oven until is cool to touch.
8) Put Heat sink compound on top of the IC/CPU and Metal Shield plates
9) Reassemble everything and test if it works.
10) Don't forget to give my reply a like if it works for you, All the Best!!!
I have attached some photos of the motherboard with some instructions on Lenovo Forum, Go to page 45 on the below link
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71 Posts

08-28-2019

US

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Re: K8 Note Switch off Automatically - SOLVED BAKE THE MOTHERBOARD

2019-09-13, 11:51 AM
Please watch this Youtube video to solve the restart / Bootloop problem



https://www.youtube.com/watch?v=0m630BisNMU
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71 Posts

08-28-2019

US

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Re: My lenovo k8 note switch off automatically

2019-09-13, 11:52 AM

Please watch this Youtube video to solve the restart / Bootloop problem

 

https://www.youtube.com/watch?v=0m630BisNMU

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71 Posts

08-28-2019

US

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Re: LENOVO K8- NOTE - Frequent switch off problem

2019-09-13, 11:53 AM

Please watch this Youtube video to solve the restart / Bootloop problem

 

https://www.youtube.com/watch?v=0m630BisNMU

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2 Posts

09-20-2019

IN

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Re: K8 Note Switch off Automatically

2019-09-20, 5:40 AM

I am also having the same issue what to do?

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71 Posts

08-28-2019

US

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Re: K8 Note Switch off Automatically

2019-09-20, 6:19 AM

You have to bake your motherboard in oven at 230 Ceius for 10 minutes and it will solve your problem. Before baking remember to disconnect all the flexiable cables and front/back cameras, rubber sleeves from the 3.5mm headphone jack and microphone and lastly remove the plastic blur lens on the front selfie flash.......if you forget to remove any of these then it will melt and you will have to again buy the replacement parts which are not cheap.

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