Zyxel switch does not auto-boot
I have about 90 Zyxel MES-2110 L2 switches amongst my deployed inventory.
I am aware that these have been discontinued, but, they suit my needs adequately.
I am slowly replacing them with Zyxel GS1900-10HPs, but many will remain in place for the foreseeable future.
A number of these MES-2110 switches have exhibited apparent failure after a reboot?
I noticed that the LED function test on the ports was not occurring after applying power to the switch, and, that the 'SYS' LED was not illuminated.
After connecting a PC via the console port, to observe any activity, it became apparent that the switch was in fact still operational, but boot up had paused, and was presenting a menu.
Typing menu option '0', allowed the switch to complete its boot up, and it was then fully operational.
I compared this boot process with another of the switches that was working correctly, and noticed that it had an additional line of boot code which stated something like; 'press 'C' within 3 seconds to prevent auto-start'.
The failed switches do not have this line of code.
How could this line of code have been deleted merely by the switch being power cycled?
More importantly, how can I restore it?
I have tried re-uploading the firmware, and, a saved config file from one of the working switches, but neither act restores it whether I do so from the CLI or the GUI.
Within the latest download files for this switch, are files named; 100BPT2.bin, 100BPT2_bm107.bin and 100BPT2_rom.bin
Would restoring the ROM file fix the issue?
100BPT2.bin I know to be the firmware file... can I safely assume that 100BPT2_rom.bin is the ROM file?
That being the case, what is the purpose of 100BPT2_bm107.bin?
Is there a specific command line instruction to upload the ROM file?
I don't wish to brick any switches by uploading the wrong file if I can help it.
Any guidance much appreciated.
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