I've seen this when the motherboard dies. Do try a few cheap things.
1. Replace the CMOS battery (we get them for 25 cents in bulk, dollar each and some owners balk at the price?) Then replace that, do the reset again but hold the button down for 60 seconds.
2. Unplug all things you can and retest. No HDD, SSD, WiFi USB etc. If it won't power up it's usually the motherboard.
Get a price on that board and check your warranty status.
Hello i have a DELL INSPIRON 15 3000 SERIES.. I started using it from october 2017... I have no problem using it until this today 31/01/2019. It just wont turn on... When the adapter is plugged the charging LED opens but later the light will disappear.. I already tried the 30 seconds power press without the battery and the adapter to release the stock power.. But it still doesn't work,,, I'm confused because why push the start button the led light opens and disappear, the ventilator doesn't turn, the screen show black light and disappear also, any help please or suggestions... please and thanks