If you're having trouble with your laptop, it could be a sign that your motherboard needs to be replaced. There are several telltale signs that indicate a motherboard issue, such as increased Windows errors or blue death screens, freezing for seemingly no reason, or connected devices that suddenly won't work. Another way to tell if your laptop needs a new motherboard is to listen for a series of beeps when you turn it on. If you hear four beeps, it could indicate a problem with the parallel or serial ports.
If you hear five, four, or three beeps after that, it could mean there's an issue with the motherboard.