ZKSoftware fingerprint X638 no sound and fingerprint sensor cannot read finger

ZKSoftware fingerprint X638 no sound and fingerprint sensor cannot read finger.Fingerprint scanners.Why does my fingerprint sensor not work?Possible causes for the issue
Software dysfunction; Button surface is wet or dirty; Change of fingerprint pattern.
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ZKsoftware X638 Double-Engine Fingerprint RFID Password.
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[@MrArsalan1988]

good job

[@monirzaman9276]

Nice video brother... I have ZK SF30 fingerprint machine but my machine is not given the confirmation sound when I punching for attendance. pl z help

[@Electronicview]

Thank you. You mean no sound from speaker right? if so change the small speaker

[@SandeepGaikwad-r8f]

Sensor change karu ya strip

[@SandeepGaikwad-r8f]

Bhai Mere device me bhi sensor work nahi kar raha hai

[@Electronicview]

try to clean or fixed