[Samsung Galaxy S7 Edge Questions and Answers] HEHEHEHAW:
Hi,

I know this has been asked a lot but I have looked at countless threads trying to rectify this issue.

I have an S7 Edge (SM-G935F) that at some point black screened itself. After numerous attempts at revival, I have managed to get it to at least display something. From what I'm guessing, something at some point has become corrupted and the phone is now soft-bricked. So what I have been attempting to do is flash stock firmware via odin.

Here is a screen showing it is soft bricked ->

Here is a screen showing its download mode stats ->

On the soft brick screen I have used the FRP hijacker tool to both "fix" softbrick as well as remove FRP. I don't think either were sucessful. However, the S7 did boot into the "Galaxy S7" splash screen and then to an "erasing" and an "installing update" screen. Both processes failed and boot loop with a message describing the failure ("dm-verity verification failed" and "fail to open recovery_cause"), but it seems like progress.

Erasing screen ->

Installing update screen ->

Fail screens ->

Also, the phone refuses to boot into the recovery menu, as if its not even there somehow. Instead, the phone boots into the "Galaxy S7" splash screen then the blue screens linked above. Sometimes it boots into the soft brick screen and sometimes into the splash screen. Its difficult to even get it into download mode as it takes a long time (hence the rubber bands to hold the buttons down) and I think the battery is toast.

I have been using Odin 3.14.4 (and 3.13.1) to try and flash stock firmware. What I have been doing is using Frija to download the latest firmware by entering the model number (SM-G935F) and then the country code. However, I do not know which one the phone is. I have done numerous (free) imei checks and one site stated that it was a United Kingdom/Ireland carrier (XEU) (it is a UK phone) but I have tried XEU, BTC, BTU, VIR and VOD and all firmwares fail to flash at the param.bin part. I have also got the PIT file from the XEU CSC_ which sucesssfully flashed, but it made no difference. I've even tried to flash the BL_ by itself to try and get the recovery menu but it still fails at param.bin. I have ruled out that I am using firmware with an older binary as the phone does not display the red text that it normally does when this is attempted. Something to note is that FRP is on, but I do not know if this makes a difference. I should also mention I have tried some firmware from Sammobile which havent worked either.

Here is a screenshot of the param.bin fail using the VIR firmware (after uninstalling the Samsung USB driver just to rule it out)

View attachment 5606061

Odin log:

<ID:0/008> Added!!

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/008> Odin engine v(ID:3.1401)..

<ID:0/008> File analysis..

<ID:0/008> Total Binary size: 4000 M

<ID:0/008> SetupConnection..

<ID:0/008> Initialzation..

<ID:0/008> Set PIT file..

<ID:0/008> DO NOT TURN OFF TARGET!!

<ID:0/008> Get PIT for mapping..

<ID:0/008> Firmware update start..

<ID:0/008> NAND Write Start!!

<ID:0/008> SingleDownload.

<ID:0/008> sboot.bin

<ID:0/008> param.bin

<ID:0/008> Complete(Write) operation failed.

<OSM> All threads completed. (succeed 0 / failed 1)

Im completely stumped now and am in need of advice. I think I have a basic understadning of how Odin works but most of my knowledge has come from attempting to fix this S7. Does the carrier/region even need to match in order for the flash to be sucessful? Does flashing the PIT or BL_ bring back the recovery menu? What are the next steps to fix/flash this S7. Does it seem like there's actually a hardware fault?

I apologise if I dont respond immediately and for the wall of text (I have tried to be thorough). Any help is greatly appreciated, thanks.