If the card uses a PCI interface, it can use the same IRQ as another PCI device without producing a hardware conflict. Double-click "Communications Port (COM1)." Check the term to the left of COM1 to see if the card uses an ISA or PCI interface. Scroll to "Resources by Type." Press "Enter." Double-click "Interrupt Request (IRQ)" to see a list of devices. Follow the directions in the Knowledge Base to correct the issue. If the message "The Device Is Working Properly" appears, click "OK" to close the window otherwise, look up the error message on Microsoft Support. Expand "Ports (COM & LPT)." Double-click "COM1." Review Device Status on the General tab to check for problems with the software driver. To repair a COM1 port, you must determine what is preventing the port from working before attempting a solution.Ĭlick "Start." Go to "Control Panel" and then click "Hardware & Sound." Select "Device Manager" from the submenu. In rare cases, the expansion card that adds the serial ports to the PC can fail, rendering both COM1 and COM2 ports useless. Faulty drivers software that enables the hardware to communicate with the operating system or incorrect hardware configuration can influence COM1 behavior. COM1 ports are often used on older PCs to connect network devices, digital cameras and mice. COM1 and COM2 refer to a computer's communications, or serial, ports.
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