Q:

How do you repair a broken circuit board?

A:

Quick Answer

To fix a cracked or broken circuit board, first adhere any broken pieces together using a plastic-bonding epoxy glue. Using a precision knife, scrape any conformal coding from the traces that may meet through cracks on the circuit board. Avoid damaging traces by not applying excessive pressure.

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Full Answer

To prevent overuse of the epoxy glue, use a small tool such as a Popsicle stick instead of directly applying the glue on the circuit board; this helps regulate the amount of adhesive, since over-application may cause more damage. For areas on the circuit board that are missing traces, find a component lead that is coming through the board, and solder a jumper board from a component lead to the trace affiliated with it.

Using a magnifying glass, verify that the green coding is scraped off near any cracks on the board; even a minor remaining piece can cause the solder not to stick properly. Apply liquid rosin flux or no-clean liquid flux to any bare copper joints that need to be soldered, and use a small amount of solder on the circuit board to connect the joints. No-clean flux doesn't require additional sanitizing; however, if using rosin flux, clean the area with rubbing alcohol. To prevent any minor cracks from expanding, drill a hole at the end of the crack using a small drill bit.

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