Uploaded November 2023 | Updated September 2026, 3 weeks ago
Repairing an ESP32 USB Port That Is Not Detecting a COM Port or Connecting
00:00 ESP32 COM port not detect and no light
00:26 Test Diode may be broken
00:35 Good Diode, not OL
00:39 test jumper with good diode
00:44 set strip (minus) diode position
00:49 replace broken diode on ESP32
00:58 Now ESP32 after repair, RED LED is On
The ESP32 is a popular microcontroller board that is often used for hobbyists and prototyping. One common problem that users encounter is that the ESP32 USB port may not be detected by the computer. This can prevent you from uploading code to the board or using it for other purposes.
Symptoms: Symptoms of a broken diode on an ESP32 board can include:
No power: If the diode connected to the power supply is broken, the board will not power up.
USB port not working: If the diode connected to the USB port is broken, the board will not be recognized by the computer.
Missing voltage levels: Specific components on the board may not receive proper voltage due to a faulty diode within their circuit
In some cases, this problem can be caused by a broken diode on the ESP32 board.
The diode is a small electronic component that allows current to flow in one direction but not the other.
It is used to protect the ESP32 board from damage if the USB cable is plugged in incorrectly.
How to test, if ESP32 broken
Plugin USB port
If no LED, ESP32 board broken.
First step if ESP32 LED indicator not light, may be small diode broken.
ESP32 cant connect to computer, or ESP32 port not detect.
Check diode near USB port, if broken. Replace that diode
Common problem on Diode, you can replace with a good diode.
Pleaes check strip Plus and Minus indicator on Diode.
Identify the diode. The diode is usually located near the USB connector. It will be a small black or white component with a marking on it.
Remove the old diode. Use a soldering iron to carefully remove the old diode from the board. Be careful not to damage the surrounding components.
Install the new diode. Solder the new diode to the board in the same position as the old diode. Make sure that the diode is oriented correctly.
Test the board. Once you have installed the new diode, plug the ESP32 board into the computer and see if it is detected
Repairing an ESP32 USB Port That Is Not Detecting a COM Port or Connecting
00:00 ESP32 COM port not detect and no light
00:26 Test Diode may be broken
00:35 Good Diode, not OL
00:39 test jumper with good diode
00:44 set strip (minus) diode position
00:49 replace broken diode on ESP32
00:58 Now ESP32 after repair, RED LED is On
The ESP32 is a popular microcontroller board that is often used for hobbyists and prototyping. One common problem that users encounter is that the ESP32 USB port may not be detected by the computer. This can prevent you from uploading code to the board or using it for other purposes.
Symptoms: Symptoms of a broken diode on an ESP32 board can include:
No power: If the diode connected to the power supply is broken, the board will not power up.
USB port not working: If the diode connected to the USB port is broken, the board will not be recognized by the computer.
Missing voltage levels: Specific components on the board may not receive proper voltage due to a faulty diode within their circuit
In some cases, this problem can be caused by a broken diode on the ESP32 board.
The diode is a small electronic component that allows current to flow in one direction but not the other.
It is used to protect the ESP32 board from damage if the USB cable is plugged in incorrectly.
How to test, if ESP32 broken
Plugin USB port
If no LED, ESP32 board broken.
First step if ESP32 LED indicator not light, may be small diode broken.
ESP32 cant connect to computer, or ESP32 port not detect.
Check diode near USB port, if broken. Replace that diode
Common problem on Diode, you can replace with a good diode.
Pleaes check strip Plus and Minus indicator on Diode.
Identify the diode. The diode is usually located near the USB connector. It will be a small black or white component with a marking on it.
Remove the old diode. Use a soldering iron to carefully remove the old diode from the board. Be careful not to damage the surrounding components.
Install the new diode. Solder the new diode to the board in the same position as the old diode. Make sure that the diode is oriented correctly.
Test the board. Once you have installed the new diode, plug the ESP32 board into the computer and see if it is detected
