If your router becomes unresponsive after a failed update (e.g., only the Power and WPS LEDs are solid on), you may be able to recover it using TP-Link's emergency mode.
Go to the TP-Link Download Center . Search the Model: Type TL-WR340G into the search bar. tp-link wr340g v5 firmware download
(better but complex):
is a legacy device. Independent security reports have identified multiple vulnerabilities, such as Cross-Site Scripting (XSS) If your router becomes unresponsive after a failed update (e
Scroll down to the section. You will see a list of available releases organized by date. Always choose the configuration listed at the top of the timeline, as it contains the final cumulative bug fixes and security adjustments made for this model. Step 4: Download and Extract (better but complex): is a legacy device
Comprehensive Guide: TP-Link TL-WR340G v5 Firmware Download and Upgrade TP-Link TL-WR340G