laptop won't boot

Jun 13, 2018
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so my laptop i have been working on died but when i plugged it back in it wouldn't boot up so i reseated the cpu, ram, hard drive and cleaned it but nothing seems to work, the fans spin up and you can hear the hard drive but after 5 or 6 seconds it completely shuts off there are no beeps or anything i have been trying everything but nothing works any ideas?
 
Solution
First (if possible) reset the CMOS. The manual should have instructions on doing so. That should help booting if a component has not failed.

A new power supply brick or battery would be my next solution.