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Motherboard replaced but there no CMOS battery

My Acer 5742 laptop replaced with new Motherboard but in that there is no CMOS battery place.it was empty.and in laptop there is double horizontal white lines on the top and bottom of screen.should I replaced screen also.please give advise.thank you.
Reply to Juda_1
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    Can you provide the SKU for your laptop? Did the older motherboard have a CMOS battery location? I'm assuming you're talking about the screen and after powering up yu get lines akin to graphics card artifcating, correct? If not can you please pass on a picture after uploading it on Imgur or any other image hosting site and linking it here?
    Reply to Lutfij
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