Overheating cpu

I have a saber enermax case and I tried to plug the tub cables into mobo for mystic light. Started my pc, and a little spark came. Plugged it out right away and started it again. Everything was fine except the cpu temperature. Checked with CAM. Cpu temp was under 40 Celsius. Checked with motherboard, it was 126 Celsius. Whats even worse is that fan is spinning, but the bios menu shows 0 rpm on the cpu fan. What should I do?

 

If the cpu fan is still working, it's possible the motherboard is simply reporting the wrong temp and it's obviously no longer able to read the fan RPM. Something was likely damaged on the fan control circuit.

You could try restoring the BIOS back to factory default and see what happens.

Aside from that, likely time to consider a motherboard replacement/upgrade.