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Samsung Galaxy Note 10 & Note 10 Plus Temperature Too Low Repair

We’ve been getting a lot of Samsung Galaxy Note 10 and Note 10 Plus temperature too low in for repair.  Generally, this problem happens after a screen repair.  Luckily, we have a fix for you.

The problem seems to lie in the NFC flex.  This is the plate that is usually connected and screwed in last after a screen repair.  It looks like this:

If we drill down a little more closely near the connector on this plate, we can see that there is a little tiny resistor embedded in the plate.

note 10 temperature too low repair

I’m not exactly sure why Samsung decided to place this resistor on the NFC flex, but this little thing serves a big purpose, which is to tell the phone when it’s too hot to charge.  Without the NFC flex connected to the phone, the phone will display the temperature too low warning.

note 10 temperature too low warning

The actual problem doesn’t usually have anything to do with this NFC flex.  The actual problem is the connector on the logic board in which this NFC flex connects to.

note 10 bent nfc connector

This is what the connector looks like on the logic board.  It’s located slight below and to the left of the battery connector.  You’ll know exactly where it is because it’s where the NFC flex connector connects to.

In the blurry image above, if you look at the bottom row of pins, you can see the gold contacts showing through the black plastic connector.  In the top row, you can’t see the pins sticking out and if you look closely, you’ll see that the connector is actually bowed outwards.  The connector in this shape usually results in the Note 10 temperature too low warning.

note 10 temperature too low connector repair

This is usually due to repeated attempts at connecting this NFC flex using too much force.  I must admit that after trying to connect this flex myself, I found it very difficult to put back on without using my microscope.  I’ll just chalk it up to a poor design by Samsung.

the fix for this problem is to use some very fine tweezers to bend the pins and connector back into shape so that the pins are showing beyond the plastic again.

note 10 plus temperature too low

You’ll need some very pointy tweezers.  Probably better to have two of them, so that you don’t break the connector.  Using one tweezer, you want to push inwards from the outside and then using the other tweezers, you want to push the bottom outside of the connector, which should result in the middle row of the pins showing past the plastic again.  You can watch a video of the process here:

If you don’t feel comfortable repairing this yourself, then feel free to request a quote and we can fix it for you.



ZXW Tools 3.3 Download – Buy Instant License

Updated November 27, 2020! Minor version update to

There is no easy way to buy a ZXW Tools 1-year license without having to wait if you are located in the United States (or anywhere outside of China for that matter) because ZXW uses an online payment system called Alipay, which is only available if you have a bank account in China.  We make it easy to get a 1-year license and activate your ZXW subscription.  Click here to purchase an instant 1-year license.

ZXW Tools is the preferred software for iPhone and iPad logic board repair.

If you came here looking to download the software, then you’re in luck.  We’re hosting the software for those that can’t read Chinese.  If you’re having trouble installing ZXW, then here is a tutorial on how to do that.  As always, you can also download the original version directly from the ZXW website.

You can download the ZXW software from the links below:

The schematics in the software are updated automatically when the program is run, so there is no need to download new software upon a new iPhone or iPad release. The software is automatically updated occasionally, but not often.

You can still purchase a dongle (version 2.6 and below) from our online store, which will give you a 1 year subscription or you can purchase a 1-year license for ZXW v3.0 from our online store.

If you want to renew ZXW, then you can also do that by buying a new license.

micro soldering supply

Updated November 26, 2020

ZXW has been released!

Updated October 27, 2020

ZXW 3.3 has been released!

Updated January 14, 2020

ZXW 3.22 + Microfish 3.2 has been released!

Updated January 6, 2020

ZXW 3.2 + Microfish 3.1 has been released!

Updated December 24, 2019

ZXW 3.2 has been released!

Updated September 17, 2019

ZXW 3.1 has been released!

Updated April 19, 2019

ZXW 3.0 has been released!

Updated July 12, 2018

ZXW 2.6 + Blackfish 2.0 is out!

Updated September 28, 2017!

ZXW v2.5 + Blackfish v1.6 is out!

Updated January 24, 2017!

ZXW v2.4 + Blackfish v1.5 is out!

iPhone Diode Mode Measurements – LogiWiki

The creator of this page has done a great job at creating high resolution pictures and iphone diode mode measurements.  These include Macbook and iPad diode mode measurements.  Diode mode readings are essential for micro soldering because without schematics, there is no easy way to diagnose and repair these devices.

Until now, ZXW was the only software that contained vast amounts of iphone diode mode measurements for these devices.  It seems as though LogiWiki has more readings now.  It’s definitely not as easy to find the diode mode readings in LogiWiki as it is in ZXW, but just use the search function on the left sidebar and you should be able to find whatever you need.


Sample from LogiWiki

At this point, I would say that this site is an essential part of iPhone, iPad, and Macbook logic board repair.  Check out the page if you haven’t already.

blankWithout diode mode readings, the only way to repair logic boards is to buy another similar logic board and compare diode mode readings from the known good logic board.  This is a time consuming and often arduous task.  Usually, if it gets to this point, then I tend to just shy away from these jobs.

For instance, Samsung devices are notorious for lack of schematics, which make them way more time consuming to repair.  These days, I barely take on Samsung devices for repair because of added time and the low success rate.

The great thing about LogiWiki is that the site is built by repair technicians helping each other.  Diode mode measurements aren’t the end all, be all, but they definitely help expedite the repair process, especially for devices where schematics aren’t widely available.

Hopefully, together, we can expand on the amount of diode mode measurements for devices where schematics aren’t available, so that we can repair more devices and keep them out of the landfills.

iPhone 11 No Backlight After DIY Screen Repair

We’ve been seeing more and more of these iPhone 11 no backlights lately.  Basically, the backlight goes out after a screen repair mainly because the battery is not disconnected during the repair.  It’s been happening since the iPhone 6s and it seems like it’s still happening with the latest iPhone versions with LCD screens.  iPhones with OLED screens aren’t affected by backlight issues because the technology is different with these screens.  iPhone with OLED screens include the iPhone X, XS, XS Max, 11 Pro and 11 Pro Max.  Although, even those phones have after market LCD screens now.

Anyways, good news is that we can repair iPhone 11 backlight issues.  What makes it a little more challenging is that the iPhone 11 is the first phone with a sandwiched logic board that uses an LCD screen.


The best way to identify an iPhone 11 no backlight problem is to shine a bright light in the middle of the screen, then look for some sort of image.  You should be able to see an icon or the apple logo or maybe a battery charging symbol, similar to this:


In the picture above, when a bright light is shined on the screen, you can see a faint apple logo, which tells us that the lcd is working, but the backlight is not.

In order to fix the backlight on an iPhone 11, we need to take the logic board out of the frame, partially remove the shield that covers the backlight components on the logic board, then take off and replace the two backlight resistors (aka backlight filters) that are blown.

The pictures above show the location of the backlight resistors.  There are two of them.  Both resistors will need to be replaced.  Since we don’t know the exact values of the resistors, we can just use the iphone 8 backlight resistors as they should be comparable.

The only thing to note about this repair is to be careful removing the shield that covers these backlight resistors.  Since the logic board is sandwiched, any heat applied to the logic board will most likely separate the two logic boards, then you’ll have other problems on your hand.  The best way to get access to these backlight resistors is to use some sharp micro cutters and snip away the shield without using heat.  You can watch a video of our iPhone 11 backlight repair on youtube.