MY Pi 4 won't boot anymore after I connected a Sabrent HB-UMP3 powered USB Hub. The Pi4 had been running just fine for around 2 years, yesterday I hotplugged the abovementioned hub and the Pi immediately stopped responding. I disconnected the hub and tried to reboot - to no avail. Not even the splashscreen and bootloader text are displayed, the TV connected via HDMI also does not detect any input. When connected to power, the Pi's red power LED lights up and the green LED next to it briefly lights up then turns off. Ethernet port LEDs light up when a cable is plugged in. Apart from that, nothing happens, no response to ping.
Any ideas how to resurrect it ?