Cant find CMOS battery for Sony vaio

Dec 6, 2018
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My old Sony Vaio vpcea45fg laptop doesn't turn on anymore. The power light is on, but the screen won't turn on nor will the lock keys work. I read that the cmos battery might have died and could be preventing bios from being booted properly. Which is the CMOS battery? I can't find a round button cell on it
 
Solution
you will need to open the laptop as the battery is on the motherboard.
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examples from other sony units, could not find the mainboard in question