DELL 5480 NO POWER

Fizzlegig

Newbie
OK, so I have a dell 5480. Has been running perfectly without any issues until last week, it powered down switching itself off, and will not power back on. I've unseated everything and tried powering on, but still nothing, the power light on the charger is lit and the heat sink is heating up so there is power getting to the board it seems. I've tried the old wife's tale of the power button for 25 seconds and all the bull, but still no boot what so ever.

Hoping somebody can help
 
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