Uploaded December 2025 | Updated September 2026, 2 weeks ago
Is your Samsung Galaxy S21 dead, stuck in a reboot loop, or refusing to turn on? In this video, I walk you through the complete diagnostic and repair process to bring your phone back to life.
Whether you are dealing with the "black screen of death," a battery that drains instantly, or a phone that keeps restarting, a battery replacement or connection check is often the solution. I’ll show you the step-by-step disassembly, how to safely remove the old battery, and how to install a new upgraded battery to fix these power issues for good.
In this video, I cover:
Diagnosing a dead Samsung S21.
Safely removing the back glass and wireless charging coil.
Disconnecting and removing the old battery.
Installing the new battery (Upgrade).
Reassembling the phone and testing for the boot loop issue.
🛠️ Tools & Parts Used:
Samsung S21 Replacement Battery: amzn.to/4sls6ao
battery kit comes with Repair Toolkit (Screwdrivers/Pry tools)
B-7000 Adhesive or Pre-cut Tape:
Heat Gun / Hair Dryer:
Learn more about Tech. Smash 👍 and Subscribe to TampaTec here- youtube.com/TampaTec
TampaTec is a participant in an affiliate link program designed to provide a means for us to earn revenue at no extra cost to you.
-These products I order myself and some I receive for free to produce a How-to Guide or Review, but I'm not paid for positive tech reviews. #tampatec #tech #installs #repairs
Is your Samsung Galaxy S21 dead, stuck in a reboot loop, or refusing to turn on? In this video, I walk you through the complete diagnostic and repair process to bring your phone back to life.
Whether you are dealing with the "black screen of death," a battery that drains instantly, or a phone that keeps restarting, a battery replacement or connection check is often the solution. I’ll show you the step-by-step disassembly, how to safely remove the old battery, and how to install a new upgraded battery to fix these power issues for good.
In this video, I cover:
Diagnosing a dead Samsung S21.
Safely removing the back glass and wireless charging coil.
Disconnecting and removing the old battery.
Installing the new battery (Upgrade).
Reassembling the phone and testing for the boot loop issue.
🛠️ Tools & Parts Used:
Samsung S21 Replacement Battery: amzn.to/4sls6ao
battery kit comes with Repair Toolkit (Screwdrivers/Pry tools)
B-7000 Adhesive or Pre-cut Tape:
Heat Gun / Hair Dryer:
Learn more about Tech. Smash 👍 and Subscribe to TampaTec here- youtube.com/TampaTec
TampaTec is a participant in an affiliate link program designed to provide a means for us to earn revenue at no extra cost to you.
-These products I order myself and some I receive for free to produce a How-to Guide or Review, but I'm not paid for positive tech reviews. #tampatec #tech #installs #repairs
