Lenovo Yoga 500-14 - Screen Flicker while on battery power, Yoga 500 laptop

Screen Flickering while on battery power, Lenovo Yoga 500-14 laptop

The battery flickers from time to time, but most flashes as the battery runs out when the battery is 10-15%, and flickering occurs more and more
---------------------
The laptop is no longer guaranteed.
Lenovo Yoga 500-14 laptop
I5-5200U processor, 2.20GHz
RAM 8.00GB
HD Graphics 5500
Windows 10 Home x64



----------------
1. Connect the charger and the flickering stops as you remove it by hand.
I have searched the forums and this problem affects some Windows 10 laptops after upgrading
2. Changing drivers to older ones etc. gives nothing
3. Replaced the system for a clean Windows without a lenovo application nothing gave the problem still occurs
4. I connected to an external monitor and the screen strange on the laptop is flashing and on the monitor I don't think it's a tape
5. Connecting the charger screen stops flashing and now
At first I thought the matrix tape might be damaged, but when I connect the charger, I stop any ideas

It would be best to replace the tape, I know, but it costs about PLN 200, so for now I want to avoid costs if it is not the tape.

Clips
1. Screen flickering
[Film: dbcd3f1ad5] https://filmy.elektroda.pl/32_1506850041.mp4 [/ film: dbcd3f1ad5]
2. Flickering screen connecting charger stops
[Film: dbcd3f1ad5] https://filmy.elektroda.pl/19_1506850117.mp4 [/ film: dbcd3f1ad5]
3. Flickering on the Screen, the monitor does not connect the charger flickering stops
[Film: dbcd3f1ad5] https://filmy.elektroda.pl/37_1506850161.mp4 [/ film: dbcd3f1ad5]

Added after 50 [minutes]:

I forgot to add so the screen does not flash when it is at rest, it starts flashing when I move the mouse, or switch to the browser, i.e. how the load increases, I turn on YouTube, it flashes when watching, I turn it off is ok

Hello. At higher brightness also flashes on the battery?

Also, I changed power options to balanced later for high performance or battery saving when I don't touch the screen or with my finger or mouse, nothing happens. I touch the screen with my finger, move it or the movie is going blinking as it has some load. The more discharged the battery, the more often it happens. The flickering is so pulsing 3-5 seconds stops for 10-30 seconds and again
Switching on the charger stops flashing.

medalik7 wrote:

The more discharged the battery, the more often it happens.

And here probably lies the problem - in the battery itself and not the tape.

Upss is not good, because just as it flashes and even for a moment connect the charger stops flashing and immediately disconnect the charger does not flash and it lasts with 5-10 m and depending on the battery charge percentage.

But one more thing worries me, if the battery as it is a laptop connected to an external monitor on the laptop is flashing on the monitor there
It is known that the monitor has an external power supply but the graphics draws voltage from the battery and here again the tape I mean is not damaged, but again as soon as the connection plug charging stops.
To be honest I have already got stupid, maybe someone had such a case

A problem also known from Asus - blinking caused by low (on the border) supply voltage of the matrix backlight and not the image but the backlight itself blinks.
In Asus, it helps to replace the matrix with another model (tolerating a lower backlight supply voltage) - a disassembled matrix can work successfully on models with a higher battery voltage.
In this case, the reason may be the same, but the solution is more difficult (matrix replacement is not so easy).
To begin with, one should measure the voltage in the main branch when powered by batteries.

And what should the voltage be like? has anyone maybe a schematic

In the main branch, voltage close to the nominal voltage of the battery.

Try to turn off ALS (automatic light sensor) in the system and give the backlight to the maximum. This should do the trick but it's just a half measure.

I borrowed a battery from a friend to rule out flashing, the battery goes off at 50% and starts flashing, plug in the charger and it's OK
I put my battery in a friend and here everything is ok or Battery is OK.

I turned off ALS sensors in the system, backlight on max, battery saving turned off in the settings of Intel and Windows still the same the battery goes down at 50% and starts flashing, plug in the charger and it's OK

In this situation, I agree with my colleague sk1977 - matrix.

And how to try to replace the "inverter" only where to get it for this model, I looked through the auction sites and there are none.
Maybe you have bearings where you can get one?

medalik7 wrote:

And how to try to replace the "inverter" only where to get it for this model, I looked through the auction sites and there are none.

- there is no inverter in this model.

What matrix?
- use Aida64 and read the matrix name (without disassembly)

Hello, did you fix the problem?
I bought a new battery and the problem did not disappear

Hello, I have the same in yoga 500-15 inches. I understand that changing the matrix helps, but really the fault lies on the plate or matrix? After all, the matrix is new in it and suddenly after a while it became more greedy for electricity? Did the disc just start to give weaker voltage? In short, if the price for the matrix + touch set is the same as for the new motherboard, what better to replace?
best regards

Hello.
I once tried to solve this problem, but I could not clearly state the cause of the matrix flicker. This not only happens with LENOVO laptops. Generally, the point is that when working on the battery itself, the supply voltage of the matrix backlight gradually decreases as a result of battery discharge. When we connect the charger, the voltage increases to around 20V. After that, when the battery is working, the matrix is usually darkened (energy saving) if the screen brightens flickering often stops.
There is one more problem. From what I remember YOGA have a sensor that automatically changes the brightness of the screen as the ambient lighting changes. It often causes the flicker effect. Just switch from auto to manual mode in the screen settings.

Everything points to the fact that matrixes with faulty systems came out (LED driver supplying the converter) and after a while these flaws of these systems manifested themselves by flashing backlight.
There is even a thread on the forum where the system designation and replacement are given without this drawback (if I remember correctly the matrix thread in Asus, but it also applies to other brands).

Hello friends,
In this case, the problem will be replaced by replacing the battery with 7.4V 2-cell, with 11.1V 3-cell. The problem will disappear.
Greetings!

Are you sure that replacing the battery will help?
I have a Yoga 500-14IBD Laptop and I have the same symptoms of battery life.
Is increasing the voltage safe?

Yes, I am 100% sure. I have already done so in about 20 Notebooks, and it has always helped. This Notebook Model originally has 2-cell and 3-cell batteries, so changing to the original battery with a higher voltage is safe. Also the exchange for the New Panel with Martyce also helped, but not always for long. Greetings!

Specifically, my laptop is the Yoga 500-14IBD (ideapad) model - Type 80N4 Machine model type: 80N4002AUK.
I use it for personal tasks and sometimes I need to work on the battery, and because after disconnecting the power supply the screen goes dark completely, I can not do anything.
For a test while working on battery, I connected the TV to the laptop via HDMI and the picture works on the TV, while the laptop is dark.
Where can you buy such a battery and will nothing burn?
Who can fix it?

And what col. Has this battery.
If you can take it out, take a photo. or descriptions from it,
Or use AIda64 should read its parameters / just like Battery Monitor.

Standard in this model 80N4 .. it
- 11V 3500 - 4050mAh, the price increases with capacity

* - other worse ones

Quote:

Output voltage (volt): 7.4 Volt
Capacity: 4050 mAh / 30 Wh / 2-Cells
* link

Support for Lenovo 80N4 model link
- provide your serial number >> you will get more ...

My battery is:
Battery Properties
The name of the device L14M2P21
SMP manufacturer
Serial number 55
Unique identifier (ID) of 55SMPL14M2P21
Battery type For charging LiP
Rated operating time 30,000 mWh
Working time fully charged 25600 mWh
Current working time 25430 mWh (99%)
Battery voltage 8.214 V
Consumption level 14%


There is no longer support for this product on the lenovo website.

You have the weakest battery (voltage) possible
* you have increased capacity for it

I think that at 11V (or more expensive at 14V) it will solve the problem
- as written Link_ here

Quote:

model type 80N4 for Lenovo Yoga 500-14IBD, the possible 45 Whr battery shows as:
FRU part 5B10G78611 Tesla SP / A L14M3P21 11.1V 45Wh (3cell)

HMM (Hardware Maintenance Manual) for download link
* there should be something about batteries, page 85
Lenovo YOGA 500-14IBD / YOGA 500-14IHW / FLEX 3-1470
LT41 14217-1?
Intel PENTIUM 3825U (SR24B)

Battery demolition link
___________________________________________
Lenovo Yoga 500-14IBD model
Wistron LT41 platform 14217-1
kbc NPCE285PA0DX
charger ISL95520 , description link

- operating mode
* other ISL95538B is a buck-boost Narrow Output Voltage DC (NVDC) charger.

As for SM, it's an option; paid or after registration (e.g. Elvikom) link

The backlight power supply is probably pin.38-40 (LVDS connector (eDP))
- see with your work on Aku your voltage there, fully charged (e.g. 7.8V)
- then measure the voltage when the flickering starts, you can "play with the external power supply"
* probably about 7.5V or 7.4 causes already visible flickering

Will this battery be ok?
Green Cell L14M3P21 battery for Lenovo Yoga 500-14IBD 500-14ISK 500-15IBD 500-15ISK
Green Cell lithium-ion cells
3500 mAh capacity
11.1V voltage
Type of Li-Poly cells
Producer of Green Cell cells

Thanks Lisek for your help.
I replaced the batteries as you wrote and the problem disappeared.
I can disconnect the power and the monitor does not go out.
Replacing the battery was easy.

I have the same problem on the Yoga 710-IKB 80V5
Are there batteries with higher voltage for this model?
Now there's a 7.54V L15M4PC2 and it's blinking on it.
It is OK on the power supply.

I also had a 7.4v battery voltage.
after changing the battery to 11.4v it is ok.

Unfortunately, the Yoga 710-IKB 80V5 models are only 7.6V batteries
* there are more capacity * standard 3 or 4 cells)
* this is what Lenovo shows in the offer for its parts (part)
* in MMH Link this is written on page 74


e.g. those with higher capacity (7.64V / 6960mAh / 52Wh / 4-Cell) Link
On (ali ...) they boast that they are replacements (replace)

Quote:

Li-Ion Laptop Battery 10.8V and 11.1V are in common use.
Li-Ion Laptop Battery 14.4V and 14.8V are in common use.

* but they don't provide any number. type B10K907xx 5B10K908xx

org. are 5B10K90778 and 5B10K90802

UK page about replacements Link

You can play (for your own use) to replace Aku by inserting
- into the area of the new Aku rectangle with a voltage of 10.8 / 11.4V or 14V
* idntyco dimensions or a bit smaller
-replace the empty space (the smaller one with the grille) or stick it to a new battery or ...
But here you need to have a "DIY imagination" of Mr. Adam Słodowy



Maybe Aku with her dimensions would fit
Lenovo L14M3P21 11.1V Li-polymer Laptop Battery (4050mAh / 45Wh)