Re: Followed this guide to replace usb pen but it boots once then wont reboot again

So Ive started getting this error again on a pen that was working fine.  Here is the output of console during boot:

U-Boot 1.1.1 (UBNT Build ID: 4567941-g15e9b5d) (Build time: Jun  4 2013 - 14:51:00)

BIST check passed.
UBNT_E100 r1:1, r2:22, f:8/135, serial #: DC9FDB165DC5
Core clock: 500 MHz, DDR clock: 266 MHz (532 Mhz data rate)
DRAM:  512 MB
Clearing DRAM....... done
Flash:  8 MB
Net:   octeth0, octeth1, octeth2

USB:   (port 0) scanning bus for devices...
      USB device not responding, giving up (status=0)
1 USB Devices found
       scanning bus for storage devices...
No device found. Not initialized?                                                              0
** Can't read from device 0 **

** Unable to use usb 0:1 for fatload **
argv[2]: coremask=0x3
argv[3]: root=/dev/sda2
argv[4]: rootdelay=15
argv[5]: rw
argv[6]: rootsqimg=squashfs.img
argv[7]: rootsqwdir=w
argv[8]: mtdparts=phys_mapped_flash:512k(boot0),512k(boot1),64k@1024k(eeprom)
## No elf image at address 0x09f00000
Octeon ubnt_e100# reset

Once I issue the reset command the router will reboot fine.

Now if Im in the house this isnt an issue.  However if we have a power cut when Im at work, I have no way of connecting to the console at home.  Is there something I can change to give the router more time to let the usb pen initialise first before it tried to boot?  If there is could anyone provide guidance please ?

Appreciate your help.

Many thanks

Andrew