Chosen Solution
Hello everyone,My m30s is bricked . The phone got off suddenly while operating youtube (A couple of apps were running in the background).Phone was running Android 11 oneUi 3I couldn’t boot into recovery mode by pressing Power + Volume up button. Didn’t work. Then read somewhere on XDA to press volume up and down together and enter download mode by connecting cable to pc.. I did that and successfully flashed the official Samsung firmware using Odin. Phone is still stuck on the Boot Samsung logo - powered by Android upon rebooting after Odin successful flash. I tried even entering recovery mode from download mode by pressing power+ volume down , releasing volume down after reboot and then pressing volume up for 2-3 seconds. I’m just not able to get to recovery mode at all. I just don’t know what else to do now. Can someone please help me out. Now after watching some fixes, i heated up the CPU and power IC, the phone did boot to Samsung only logo (which means the heating partially worked), it then rebooted back to the original Samsung - Powered by Android boot screen. i did a Power+Volume down, the phone switched off and now the phone refuses to switch on. All i can see is a Flashlight - Blinking at times and at times it stays just like that. Voltage showing on battery after testing with multimeter only max 2.8 volts. Battery is 4.4 volts on the label and nominal capacity as 3.85 volts. I need to know what does Flashlight on/Blinking + Phone dead indicate. Perhaps it could give me some clue as to which direction i need to get going.
Applying heat to a cpu is not really a fix, but if it did make a difference, it is possible that that chip has failed. Heating can sometimes temporaly restore the function of the IC which gives you an idea that it needs replacing If that chip is infact the cpu, then I think your out luck Your batterg voltage is too low to boot the phone at 2V ish. It need to be at least 3.6V to 3.7V You.could plug in the charger and take a voltage reading at the battery connector to see of the voltage there is higher then the battery while the battery is plugged in. That would give you a clue if the motherboard is charging the battery or not.
