Node not responding: no courtesy tone, no IP, but PTT LED lights up (Node 63766)

Hi everyone,
I'm experiencing an issue with my AllStar node (Node 63766) and would appreciate any advice.
The node powers on and the green PTT LED lights up when I key the radio, which suggests the hardware is at least partially booting. However:
• It does not emit any courtesy tone
• It does not appear on my router or DHCP lease list
• It does not respond to SSH
• All relevant ports appear closed when scanning the local network
• Power supply is confirmed stable and other devices (like my DMR hotspot) are working fine
I’ve inspected the SD card’s /boot partition on another system — it appears intact, with files like config.txt, cmdline.txt, and kernel.img present.
At this point, I suspect the system may be stuck early in the boot process or the ext4 partition may be corrupted.
Before I try flashing a new image, I’d like to know if anyone has experienced similar behavior or has tips on further diagnosis or recovery.
Thanks in advance!
73,
Jesús Pavón Abián – EA7LEE
Sorry for my english, is not my native language.

I would suggest putting a monitor on your Pi (assuming it's a Pi) and see what happens.

I thought about it, but I don't have a monitor and keyboard handy that I can connect. I think it'll be quicker to just reinstall the system. It really looks like the SD card got corrupted.

Sorry for the double post.
I have reinstalled the system on a new SD. It turns out that the SD card had broken.
Everything works fine except the connection to Echolink. The audio I receive sounds distorted. Oddly enough audio coming from other Allstar nodes is heard perfectly.