How to fix a burned circuit board

Updated April 17, 2017

A circuit board is one of the key components that is responsible for the normal operation of a computer. These are better known as motherboards. Over time, a computer can become overheated; this can result is the circuit board becoming damaged and in need of repair. With some technical skill and a few tools, you can repair a circuit board yourself.

Look at the burnt circuit board and examine the size of the discoloured area, which distinguishes the burnt portion of the circuit board. Determine the depth of the damage from the burn. The burnt portion of a circuit board will range in colour anywhere from medium brown to black, and this material should always be removed.

Use a small screwdriver to cut away at the burnt portion of the circuit board. Note that the material will be bevelled at the edges once the burn is completely cut from the circuit board.

Clean the circuit board with solvent to remove all excess particles. Use a combination of powdered fibreglass and epoxy liquid to fill the portion of the circuit board that was previously cut away. The edge of the board and delaminated layers should be completely filled.

Smooth the surface of the newly repaired circuit board using a small-tip soldering iron. If necessary, drill new holes into the repaired area, where screws were inserted to hold the board in place. Use a small drill bit, as the area you are working on is also small.


Be sure to follow instructions that came with your epoxy kit when you use the epoxy liquid.


Use goggles to protect your eyes if you drill into the circuit board.

Things You'll Need

  • Screwdriver
  • Epoxy kit
  • Solvent
  • Powdered fibreglass
  • Small-tip soldering iron
  • Drill with small drill bit
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About the Author

Renee Gerber has over 14 years of editorial experience and is an editor for a sports website. She has published several articles on pro-wrestling at and other websites. She obtained a Bachelor of Arts degree in journalism at Baruch College in 2001 and is enrolled in a program to obtain a certificate in digital design.