Unable to boot up BIG-IP 3400 load balancer.

Hi ybloi,

to troubleshoot your problem further you basically have to connect a console cable to your box and observe the boot process to see where it stops.

Manual Chapter: Serial Console Connection

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/f5-plat-hw-essentials/1.html

Via console you may also enter the EUD (End User Diagnostic) to check your hardware.

K7172: Overview of the End User Diagnostics software

https://support.f5.com/csp/article/K7172

If the boot loader can't find a bootable partition, you may also try to enter the F5 Disk Erase Utility to check if the hard drive is accesible (do not erase anything, just check if the utility displays you a disk).

K15521: Using the Security Erase Unit ATA command to perform a disk erase for SSDs and HDDs

https://support.f5.com/csp/article/K15521

Cheers, Kai