I already tried all of the option, but one thing that I can't do, which is firmware flashing since I can't get my TP Link Mifi to Fastboot. Can you guide me on that process?

Good day! I have TP-Link M7350(EU) V4.1 Rev1.0. I want to use this device for my DIY Project. But since I haven't use it for so long, when I try to boot it up, it hangs on logo. I tried to replace...