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Remove the 4 screws on the back using a PH2 screwdriver
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Lift off the housing
Ask FixBot
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Shown here is a small transformer, a rectifier with 4 diodes, a capacitor, and an LM7805 voltage regulator.
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The circuit consists of an MQ-5 gas sensor, CMOS 4011, NE555 timer, LM358 comparator, a button, a piezo speaker, a potentiometer, resistors, and capacitors. That's it.
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The gas sensor presumably needs to be heated, which is why the circuit board is discolored.
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If the connector weren't severely bent and the threaded pieces broken, the gas detector would certainly still have worked.
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