A laptop that won't turn on at all is alarming, but it's rarely the whole motherboard — a handful of specific, often inexpensive faults are the usual cause.
If none of the quick checks show any sign of life at all — no lights, no fan, no sound — this needs a proper hardware diagnostic to identify the actual fault rather than guessing.
Tell us what's happening and we'll give you a straight answer on cost and timeline.
No — in a large number of cases it's the charging circuit, battery, or a loose component, not the whole board. Proper diagnosis is worth doing before assuming the worst.
In most cases yes, since the storage drive is often unaffected by a power-on fault — we can usually still access the data even while the laptop itself is being repaired.
Simple charging or battery faults are often same-day. A genuine motherboard-level fault takes longer for proper diagnosis and repair.