NEC LC1400 Service & Reference Manual page 154

Message
System timer error*
UMB upper limit segment address: nnnn
Video BIOS shadowed
*If your system displays this message, write down the message and notify your customer representative.
If your system fails after you made changes in the BIOS Setup menus, you may be able to correct the
problem by entering Setup and restoring the original values.
BIOS Messages (Continued)
Description
The timer test failed. Requires repair of the system
board.
Displays the address nnnn of the upper limit of the
Upper Memory Blocks, indicating released segments of
the BIOS, which may be reclaimed by a virtual memory
manager.
The video BIOS is successfully copied to shadow RAM.
Problem Solving 5-19