The FC interface was disconnected when I unplugged it

Sometimes Windows locks the port, so try unplugging and replugging the USB cable to reset it. If that doesn't work, restart your PC. Used when your flight controller is in normal operating mode �...

Industry
Sep 01, 2025

How to Fix Flight Controller Driver Issues — Can''t Connect to

Having trouble connecting your flight controller (FC) to Betaflight configurator on your computer, or flashing firmware? In most cases, this is caused by missing or incorrect drivers, or bad

Read More 3,657
Industry
Jun 01, 2026

Fiber ONT Troubleshooting | BroadbandSearch

Don''t let optical network terminal (ONT) problems disrupt your fiber-optic experience. At BroadbandSearch, we developed this guide to help you avoid unnecessary service calls and prevent

Read More 2,856
Industry
Jun 12, 2026

Resolving errors with Fibre Channel communications

Refer to a list of actions to identify and resolve communication errors with Fibre Channel devices. The following steps help you to identify the source of the problem and resolve the error. Perform these

Read More 2,347
Industry
May 26, 2026

Cisco NFNIC HBA stays in "link-down" state after physical link is

When these are out of sync, this is an unsupported configuration. To understand which UCS software/firmware is supported with which Cisco NFNIC driver, please refer to Cisco Compatibility

Read More 5,528
Industry
Jan 23, 2026

Causes and Solutions for Flight Controller Failing

If your flight controller (FC) fails to connect to the APP, please follow these steps to troubleshoot and resolve the issue: 1. Check if the UART is Enabled. The most common cause is the

Read More 5,134
Industry
Jan 07, 2026

Happymodel EP

Disconnect and close your FC Configurator app (Betaflight Configurator, INAV Configurator, etc). Power-cycle the Flight Controller. If you plugged in LiPo, unplug it. Unplug-replug the USB Cable from your

Read More 3,322
Industry
Aug 10, 2025

Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x

To make the interface operational, you must first fix the error conditions causing this state; then, administratively shut down and reenable the interface. The port negotiation failed. The Fibre Channel

Read More 580
Industry
Oct 03, 2025

PC crashes when cable to audio interface is disconnected

I successfully calibrated my system for input latency, after which my PC crashes when I disconnect the USB cable from the USB port, connected at the other end to a Focusrite 2i2 (2nd

Read More 6,798
Industry
Jun 25, 2026

Cisco MDS 9000 Family Troubleshooting Guide,

To make the interface operational, you must first fix the error conditions causing this state; then, administratively shut down and reenable the interface. The port

Read More 6,464
Industry
Nov 21, 2025

FC link down

Swap FC cable with another target port and link comes up Connected FC port on Brocade / Cisco MDS switch is down and when enabling it goes down after about a minute

Read More 3,439
Industry
Jun 09, 2026

FAQs and user guide – MATEKSYS

Red/Blue/Green LEDs light up/blink normal when FC booting, but FC can''t connect to configurator, or can''t go into DFU mode. Unplug USB and close configurator, plug USB back in and run configurator

Read More 4,291

High-Density Fiber & AI Interconnect Insights

Need High-Density Fiber Solutions?

Contact us today for product inquiries, custom assemblies, or technical support