Category Archives: Disassemble

How Did I Fix Samsung Thin 64gb USATA MLC SSD Hard Drive – Revive From Dead

Months ago I was experimenting with USATA SSD hard drive and use it with my PC for a while. After a few days, I went for a driver update on my system and then System was suddenly frozen. So I had to restart the PC and after that HDD wasn’t recognized by the PC. So I did the almost every trick in the book to get it back to work again, but it was a really dead and nothing could detect that hard drive again. However, I thought it’s a driver update that kills the HDD, but later I found out my power supply is not good as I thought and I had to replace it later.

However a few days ago I had time to look at that SSD Drive again and as expected, it doesn’t show any response when connect to the PC, even BIOS couldn’t detect it. So I assumed it had hardware issues and went to find some resources over the internet. I expected to find datasheet and check it’s for possible faulty units. But unfortunately I couldn’t find datasheet, so I went to check the HDD board without any clue.

First, I checked USATA power unit for getting an idea and I got a low resistance reading for both polarities around 200 ohms and it was odd because of it should be having a one way resistance if it use any of rectifier diodes in the circuit. And I was guessing 200 ohms is acceptable because its drive in only 3.3V so it need lower internal resistance to get more power inside to get to work done. So, according to V=IR it’s draws 15mA in ideal but I had no idea it’s good or bad without any reference.

So I went further on the path for something looks bad and for my luck, I notice something looks like a capacitor, in the middle of path of +3.3V, given me readings of resistor but when the polarity change it’s given me a different reading than first one. So I immediately remove it from the circuit and check it and it’s again given me to the same result.

Since I didn’t have any reference I couldn’t find what that was exactly. So I draw the paths so I can see clearly what it could be.

As it’s clear it could be diode or resistor or inductor or fuse to go DC current through it. Anyway, there is no point of adding a resistor in this place so I could remove resistor from guess list. And also, no point of using inductor here unless frequency filter is needed. Since it’s getting already smoothed DC voltage it could be eliminated from the list. Then there is a possible chance to be it a diode but because of the same reason it doesn’t make any sense. Also adding diode here would add a voltage drop, possibly between 0.7V – 0.3V and it doesn’t seem right. However, it does look like capacitor, but it’s not possible to be a capacitor, so my only guess was it could be some sort of fuse. And it was acting as 1st line defense and my faulty power supply blow it. That all makes perfect sense. The only thing bothering me was, if it was a fuse and it is blow up by higher current it shouldn’t be giving me resistance reading between its terminals.

Anyway, I was out of options and I could not find anything similar to that in other hard drives I had. So I decided to go for fuse and take a risk for already dead SSD Drive. Then I short the paths like if it was a fuse. Then check the internal resistance between GND and +3.3 terminal and make sure nothing shorted in the paths. And then connect SSD Drive to the power and check for unusual heating. At this point I could have tested how much current it draws from the power supply and compare it with before, but I forgot to do that. So I connect SSD HDD to the PC and turn it on. Boom! It worked!

After that, I install windows 10 on the drive, test benchmark and everything was looking good. Unfortunately, I didn’t have any reference about how it was performed before, so I could have compared it. In my test, it was heat up around 400C without any cooling. I’m guessing it’s ok to be heating up without blows up anything.

In summary, this is not universal fixing method for fixing everyone’s SSD hard drives. My point is, you could possibly fix your SSD hard drives by following something similar steps. But you have to be extremely lucky.

Something To Do With Broken Screen – Turn LCD Panel in to Illuminated Backlit Picture Frames

When you have some LCD panel from old laptop or monitor or TV, there are lot of interesting projects you can try to do. However lot of projects are limited on usability of panel and it’s condition. Anyway last week I got 2 broken LCD panels from laptop and I was too excited to do something interesting with it. Since both panels are broken I’m going to make good old Illuminated Picture Frame or Backlit Picture Frame withing those. So if you got working LCD panel you can try some other projects like, Smart Mirror or Secret Monitor and projects like those. 

So my plan was remove LCD or TFT panel from it’s back panel and power up that backlit panel alone and make picture frame withing it.

My LCD panels are comes from Dell inspiron series laptops, so it’s contains LED back lit panel which is suitable for my project. Unless your panel is too old or too good, model number isn’t going to be problem. If your panel too old it will contain florescent bulbs to illuminate back lit panel instead LED’s on newer panels. It won’t be problem but those will consume more energy than LED panels and unlike LED’s you will need special driving circuit to use it. If your panel is too good, if it’s something like OLED or AMOLED panels, you won’t be able to find separable backlit panal and you have to go for another project to try. 

If you got separate your panel from it’s housing or from whatever it’s source like these you are good to go.

First step is separate back lit panel from whole unit. It’s depend on type of panel and usually panel is stick together by tapes or ticks. In this panel, it’s easily separated after all tapes removed.

After separate you can see there is some connectors coming from back lit panel witch is used to power up panel. Usually those connectors connected to LCD control board by somehow. You should be carefully separate those from each other. 

Next thing is find paths and power up back lit panel. In my case there is 5 lines comes from panel and I assumed widest line for V 0 ( Ground ) and others are different set of led +V Lines. Anyway in this step I have connected this to the power supply and tried to power up panel by starting with 3V but couldn’t get anything up to 19V. So I deiced to break through panel and see what it’s made of.  

After break through I found one LED strip with 3 set of 9 LED series, which is total 27 Led’s on the line. And also I found out I need  27V (3V * 9LED) for the power up this strip in rough estimation and unfortunately it’s turns out I don’t have the right equipments to make enough voltage to run this panel.  

 

So for now I’m stuck with this step but I’m going to find solution for that pretty soon. So if you have same problem and couldn’t power up panel, remember that dissemble back lit panel will almost screwed the panel. It will be not same as before it was.

LG X-Note LGE-DMLGA51(B) Review – Dissemble

Type: Notebook
System Model
LG Electronics Inc. A560-XH55K 03

Board: Quanta QLGA
Bus Clock: 100 megahertz

Processor:
2.60 gigahertz Intel Core i5-3230M
64 kilobyte primary memory cache
256 kilobyte secondary memory cache
3072 kilobyte tertiary memory cache
64-bit ready
Multi-core (2 total)
Hyper-threaded (4 total)

Controllers
Intel(R) 7 Series Chipset Family SATA AHCI Controller

Display
NVIDIA GeForce GT 640M [Display adapter]

Memory Modules
DDR 3 – 2 Slots
Communications

Bluetooth(R) 4.0
Wireless-N 2230 Wi-Fi Adapter
Qualcomm Atheros AR8161 PCI-E Gigabit Ethernet Controller

LG HD WebCam

1 x USB 3.0
2 x USB 2.0
1 x HDMI
1 x VGA
1 x Card Reader

Fix Samsung Galaxy G 955XU – Motherboard replacement

Samsung Galaxy G 955XU is live demo unit of Samsung Galaxy S8+ with Qualcomm MSM8998 Snapdragon 835 which is same configuration as Samsung Galaxy G 955U or Samsung Galaxy G 955U1. only deferent of 955XU and 955U is there are no mobile network functions included on 955XU device in hardware level. And also it contains some demo apps that very annoying in regular use and nearly impossible to remove completely.

In another thread here,I tried to recover SM -G 955XU device but couldn’t get anywhere. So in order to make it work again I did replace it’s main board from G 955U device and get it’s back to the work successfully.

For the fix Samsung Galaxy G 955XU you need completely working Samsung Galaxy G 955U motherboard. There are several models available other than G 955U, like G 955F . But I’m not sure they are compatible to each other so I have tested only on G 955U and if fixed perfectly on G 955XU.

Before begin you need phillips #00 screwdriver, hot gun and opening pick. for the hot gun you can also use the hair dryer. I’m not explaining dissemble process. you can watch it via ifixit here–>

Note :

  • You can use all the parts from 955XU device other than main board. even the fingerprint sensor will work with new main board.
  • After dissemble device, it will lost it’s waterproof capability. keep in that mind.
  • If you are in deferent region or carrier , you may be won’t receive updates directly to the mobile. but still you can update the device via Smart switch application.

 

For the replacement I found screen smashed device from eBay and it’s cheapest way to find one but you have to make sure inside of mobile doesn’t get damaged or otherwise you have an another trouble to deal with. Also make sure purchased item does not stolen from anywhere, if possible make sure you directly bought from the owner. however check IMEI number for possible blacklists.

 

Here I got screen smashed Samsung Galaxy S8+ G 955U device and Samsung Galaxy S8+ LDU G 955XU device with firmware locked.

If all the things are set, dissemble the devises and remove mother boards.

 

You can see both motherboards are almost identical to each other. Only true deference between them is Galaxy G 955XU LDU device doesn’t have mobile network IC’s or other equipments support it in hardware level. You can see that deferent between them if you removed those protective plates from motherboards, but I’m not going to do that here.

I just simply replaced board, reconnect all cables and assembled phone then boom. That’s it.

You can use double tapes or glue, whatever your prefer method to seal phone. But careful with water proof. may be it won’t be good as it was before.

Samsung Galaxy G 955XU Firmware – Discussion – Development

UPDATE – In this thread I was failed to find firmware solution for 955XU device but instead I was able to replace motherboard from G-955-U successfully. you can read that post from here.–>  

This thread allocated to discussion or reports about G 955XU particular samsung galaxy s8+ LDU module. Since samsung doesn’t sell this units officially lot of peoples calming those devices are stolen. but I believe there are ways to legally own this device. however if someone got 955XU and tried to play with OS and now in trouble and looking for stock firmware, I cannot say I have a solution but I must say I’m in the same boat as you are.

Like I said I have flashed 955XU device with this firmware for root the device. And end up with security error and now I’m trying to revers it back to at least it’s original condition. unfortunately for 955XU model there are no free stock firmware in any known places. and there are no developments or supports available. I have look everywhere for weeks to find some help but no luck. In my research I have seen people like me ask 955XU firmware and such questions in threads like Xda but no one gets answers and lot of are banned or threads closed due to their policies.

So in this I want make place to share knowledge about 955XU , at least share my knowledge with among others.

 

 

 

Places I found that 955XU Stock firmware’s available ->

Easy-firmwear – https://easy-firmware.com/index.php?a=browse&b=file-info&id=87351

GSM-Files – http://www.gsm-file.com/files/smg955xu-9161

Combine Files – http://combinefile.com/home/browse/category/id/8028/SM_G955XU_Firmware/

 

There are more places on the web, however I have purchased firmwear on Combinefiles.com but didn’t work. that firmware only have BL and CSC, I’ll post result below with different flash tries. 

 

According to some threads in the Internet  LDU units of old models (S7,6) firmware and it’s normal firmware’s only different is modem.bin file and some other bin files. in S8+ firmwares we can see modem.bin file in CSC file. And other bin files locations are unknown. 

G955X RDU have it’s arrival G955F and some claimed these devices firmwares are compatible to each other. But there are no source about 955XU arrival. Also 955X and 955F are Exynos variant, So if there are 955XU arrival exist it has to be one of flowing module.

955UNot Worked

955U1 – Not Worked

955A – Waiting for test

955P – Waiting for test

955T- Waiting for test

955V – Waiting for test

955R4 – Waiting for test

955W – Waiting for test

9550 – snapdragon variant but it’s storage 128GB (this couldn’t be one – memory mapping has to be different I suppose )

 

Since 955XU is snapdragon variant BOOT LOCKER is still cannot be unlocked. which means no custom roms.

there is now TWRP is available for Galaxy S8 and S8+ (Snapdragon) But didn’t work for me.

1.


955XU Firmware

Odin – BL + CSC

dm-verity error 0x02


2.


955U Firmware

Odin – BL + AP

dm-verity error 0x02


3.


955U Firmware + 955XU Firmware

Odin – BL (955U) + AP (955U) +CSC (955XU)

odin error – model mismatch


4.


SMPWND Firmware

Comsy Odin – BL + AP + CSC + CP

Security error – this phone has been flashed with unauthorized software..


5.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL + AP + CP + CSC (955XU)

Security error – this phone has been flashed with unauthorized software..


6.


955XU Firmware

Comsy Odin – BL +CSC in AP tab

Stuck on logo


7.


955XU Firmware

Comsy Odin – CSC

Repartition – yes

Stuck on logo


8.


955XU Firmware

Comsy Odin – BL + CSC

Repartition – yes , Auto reboot – no

Stuck on logo


9.


SMPWND Firmware

Comsy Odin – BL

Security error – this phone has been flashed with unauthorized software..


10.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL(955XU) + AP (SMPWND) +CP (SMPWND)

Stuck on logo


11.


SMPWND Firmware + 955XU Firmware

Comsy Odin – BL(955XU) + AP (SMPWND) +CP (SMPWND) + CSC (SMPWND)

Stuck on logo


12.


Combination File – COMBINATION_FA70_G955USQU1AQG3

Odin – AP

Security error – this phone has been flashed with unauthorized software..


13.


955XU Firmware

Odin – BL

odin error – Model mismatch failed


14.


955XU Firmware

Comsy Odin – BL

Stuck on logo


15.


955XU Firmware

Comsy Odin -CSC

Repartition – yes , Phone EFS clear – yes

Stuck on logo

 


16.


Combination File – COMBINATION_FA70_G955USQU1AQG3

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


17.


955XU Firmware

Comsy Odin – BL + CSC

Repartition – yes , Phone EFS clear – yes , Boot loader update – yes

Stuck on logo


18.


Combination File edited – COMBINATION_FA70_G955USQU1AQG3 + 955XU CSC files repack

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


19.


955XU Firmware

Comsy Odin – CSC on AP tab

Security error – this phone has been flashed with unauthorized software..


20.


955XU Firmware

Comsy Odin – BL

Stuck on logo


21.


Combination File – COMBINATIONF_A70_G955USQU1AQD8

Comsy Odin – AP

Security error – this phone has been flashed with unauthorized software..


22.


955U Firmware + 955XU Firmware

Comsy Odin – BL (955XU) +CSC (955XU) + USERDATA (955U) in AP tab

Repartition – yes , Phone EFS clear – yes

Stuck on logo


23.


955XU Firmware modified

Comsy Odin – BL (955XU) +CSC (955XU + 955U)

Stuck on logo


24.


955U Firmware

Comsy Odin – BL + AP

Security error – this phone has been flashed with unauthorized software..


25.


955XU Firmware modified

Comsy Odin – BL + CSC (955U + 955XU + SMPWND) repack

dm-verity error 0x02


26.


 

Something to do with classic phone

Use classic phone reciver with your mobile phone

Everyone loves some classic stuff in our houses not in use at all. we never things to throw them away because that feels sad. and it’s not bad because there are plenty of things to play with them. lets begin with old phone that we are not use anymore. here I had that old CDMA phone. not much old but it’s kind of old stuff. I like it’s receiver more than modern mobile phone because it’s feels good. today I’m gonna use this with my mobile to make calls.

 

For this project we need 

  1. Solder
  2. Soldering Wire
  3. Old headset or 3.5mm audio jack with 4 channel
  4. wires
  5. multimeter

We are going to just easy stuff. first we identified paths of receiver. in this case receiver has 4 pins and it’s basically divided for 2 pins for mice and another 2 for speaker. Just remove cover in receiver and use multimeter to identify paths. 

If someone not interest in keep this and whole other phone in this case just skip next step and cut this wire and move to next step. for me I like keep whole thing so I dissemble old phone and identified connector paths in there. 

After identified correct paths it’s time to connect those in to 3.5 mm jack. just remember if you are use regular 3.5mm jack, you have to know it’s pats which support to your mobile phone. different mobile phones use different wiring. so it’s depend on what kind of mobile you use for this project. here is some diagrams that use common mobile manufactures. however if you have working headset you can check your self what are the paths are like that.

After done that you are ready to directly connect those in to receiver. just solder those in to correct places. Use left or light one channel and ground for speaker. and use mic and ground channel for microphone in receiver. and it’s done.

if you are smart enough you can use switch from old phone to answer and reject calls. let’s do that later.

However there are few drawbacks in this way. speaker is not loud enough and other person hear what he said again. and sounds quality was terrible. So after all this become useless ^^

Anyway I have find some solutions and I could reduce those problems.

  1. I disconnected all the paths that connected in old phone main board via receiver jack. 
  2. I used another speaker and mic taken from broken headphone and headset.

Those reduced my problems to almost zero. so I have classic phone receiver to answer any call with pleasure. 😀