Pls guys how do i fix my u8799 mother i wrongly placed the ram in it then it sparked now the gpu, keyboard and other components are working but it coming up and the cooling fan is working so please help me out

That appears to be a really old Socket 478 (Pentium 4 or Celeron) board. No schematic was issued for these so you rarely can repair them. The only good news is such is usually cheap on Ebay. At least here.

The spark usually means the tech forgot to remove power from the PSU before working on the machine. They usually lose one board before they learn that lesson.

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