Friend of mine brought this bricked RB951 and i’m trying to revive it with not much success. The device bricked after RouterOS update. It never came back after reboot.
Will need your help people.
Lets start with what i’ve done so far ..
NetInstall is not possible because the device is ignoring the reset button.
Hold the reset button for 5 minutes.. no luck.
Device is booting.. but i’m unable to connect with mac address. It even wont answer back to mac ping fro another mikrotik BUT
using wireshark i saw LLDP packets coming from the bricked RB951.
The device appears in neighbors with version 6.45.6 and 0.0.0.0 ip on all ports (also applies for winbox discovery)
Resetting to defaults is not working
Tried to boot the backup BootLoader but no luck. even tried to access serial with jtag cable directy on board.. but as far as i know the device might not support it at all (lack of urt chip?)
It feels like the device is properly working but the RouterOS is somehow miss functioning .. and wont reply or allow access… or even net-install.
I’m running out of ideas here.. so anything might help.
Thnx
Device can’t ignore the reset button, it works even if there is no OS on it. Holding it for too long will yield no results.
Just make sure you hold the button before powering the unit. Then release when LED is flashing.
Well @normis personally i ve had cases where the reset button did nothing during the booting process… Neither Reset, etherBoot Mode nor anything else…
And it wasn’t physically damaged…
I ve had such a problem on a 951Ui-2hnd…
After NetInstall the button was working again as expected…
@normis
Have tried countless times…Not working Also ..trying to hold it for 300sec was actually your suggestion i found on another thread. @Zacharias
That’s the issue..i cant net install
I have tried to keep reset for 15-16-17-18 secs and so on… but the moment i release the reset button the device boots normaly. Double beep in the end.
I dont see it in winbox discovery.. and if i see it there … i cant connect using mac.
As you pointed, holding the reset button for more than actually needed, will not cause any problem nor it will escape the netinstall (etherboot) process…
So it is good you did try that…
Let me ask you this, did you try with other versions of netinstall? Try with a few older ones…
Also, am sure you have done that, but… are your firewalls, antivirus programs and other ethernet or wireless adapters disabled? If not try to disable everything and olny let 1 ethernet adapter active…
Finally, sometimes, it helped, adding a switch (just a simple switch), between the computer eth port and the eth1 of the device that is going for netinstall.. so try this as well…
As for the 300 seconds you found on another post, it is not ofcorse a random number… 300 seconds is the max value of reformat-hold-button… When you press the reset button for more that the reformat-hold-button time and less than the reformat-hold-button-max then everything is erased from the nand memory and the device upon reboot will automatically go to etherboot mode for netinstall…
But, if lets say the reformat-hold-button value is set to 250 seconds and the reformat-hold-button-max to 260 Seconds, for the procedure to succeed you must be within 250..260 Seconds…
So if any parameters like these are set it is really difficult to make it work since you do not know what those values are…
even tried to access serial with jtag cable directy on board.. but as far as i know the device might not support it at all (lack of urt chip?)