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what do i do if my laptop cannot boot up from the boot page
Sounds like you’re hitting the blinking question mark in a folder icon. If thats the case then your Hard Drive (HDD) or your Solid State Drive (SSD) or the SATA cable has failed Your Hard Drive Cable Is A Ticking Time Bomb I would start off replacing the cable MacBook Pro 13" Unibody (Mid 2012) Hard Drive Cable following this guide MacBook Pro 13" Unibody Mid 2012 Hard Drive Cable Replacement If you are not getting any response from your system then you likely have a dead battery or something deeper.