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Replace the Real Time Clock (RTC) Battery | HP Probook 640 and 645 G2 Notebooks | HP Support - YouTube
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Remove and Replace the Real Time Clock Battery on HP ProBook 640 and 645 G2 Notebooks | HP® Customer Support
![Does anyone know what happending, it kept saying setup setting error, cmos checksum error or cmos battery loss occurs. it happend yesterday at night i thought it just a error that it Does anyone know what happending, it kept saying setup setting error, cmos checksum error or cmos battery loss occurs. it happend yesterday at night i thought it just a error that it](https://i.redd.it/bep18gtzni291.jpg)
Does anyone know what happending, it kept saying setup setting error, cmos checksum error or cmos battery loss occurs. it happend yesterday at night i thought it just a error that it
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Remove and Replace the Real Time Clock Battery on HP ProBook 640 and 645 G2 Notebooks | HP® Customer Support
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