Just for your record:
To "rescue" an ipLDK-24, you need a special boot software (*.BIN). The ipLDK-24 and a PC with TFTP server is connected in a small network, using a switch.
From the PC, also equiped with a serial port, and cabled to the ipLDK-24's serial port on the MFB board in slot 0.
MFB is "Multifunction Board".
The ipLDK-24 is booted and some commands are entered via hyperterminal to the serial interface.
The the ipLDK-24 is rebooted and the new s/w is transferred to the ipDLK-24 from the FTP server.
After this procedure, it is possible to logon again with the standard logins.
This procedure could be recovered by an LG Distributor, but they must use special software tools to do this.
These tools are not available to anyone else.
///doktor