Why my phone is stuck on a black screen? It has no recovery, no OS.

[sanatan panigrahi]

My phone is Lenovo vibe P1m. I had rooted it using my pc. One day I uninstalled SuperSU and tried to install Magisk. During this process, I don't know what happened but somehow the twrp recovery and the operating system got deleted. Then i booted my phone into recovery. Then my phone was stuck in boot loop. There was only a white screen with the brand name. After some days I tried to flash the stock firmware using sp flash tool on my laptop. When flashing was completed, I disconnected my phone from pc and switched it on. Now there is no white screen with phone's brand. There is only a black backlit screen. Now my phone has no OS, no recovery mode, nothing. Only a black screen. How to fix this?

 

[Rukbat]

About the only thin you can try is flashing the ROM again. If that doesn't work, the phone is hard-bricked (unrecoverable).

The most likely reason it happened is that you uninstalled SuperSU, but you didn't delete su, so when you tried to put Magisk on the phone, it had 2 su files and they conflicted, causing the phone to execute code in another country (it's called "blue-skying" - the phone just executes stuff that end up doing who knows what - in your case it was wiping a few partitions, maybe even wiping the partitions themselves).

If you can get the ROM working again, choose system rooting (like SuperSU) or systemless rooting (like Magisk), but don't install both. That always ends up in something bad.