we have SMPS issue for this pc

If an SMPS is not working and there’s no power output, start by checking the basics. Ensure the input power cable, socket, and switch are working. Inspect the fuse; a blown fuse often indicates a short or surge. Look for visible damage like burnt components, bulging capacitors, or loose connections. Test the input and output voltages with a multimeter. Overheating or overload protection may also shut it down—disconnect all loads and try again. If there’s still no output, internal components like rectifiers, MOSFETs, or capacitors may have failed and need professional repair or replacement.