Hello
scenario:
RB2011-RM running super, upgraded to 5.24 and it died.
It was running 5.23 with latest routerboard firmware, perfectly.
Died as:
a) just blue led powers-up
b) no console output (using a cisco cable to my serial port, no output in any speed 9600 to 115200)
c) LCD is off
d) when I connect an eth cable, it lights up on the ports 1-6 only
The unit has been up since november 2012.
Today, the second one has died after upgrade.
from 5.23 to 5.24
every routerboard under UPS, with shiedled cable, 20 °C temp… if MT costs 80 EUR and cisco cost 5000 there is a reason…
Looks like serious Mikrotik error.
New RB2011 with FW 5.22 updated to 5.24 + firmware update after and router failed, reboot fixed it.
Mikrotik is since RB800 piece of crap hardware and software, abandoned long time ago on wireless and now I bless for UBNT routers to be decent replacement.
I have tried with console cable + netboot.
The first one, no output, DEAD
the second one, bad network connections and doesnt copy the firmware.
weird. try netboot. both for update or recover from attempts of it.
booting from backup loader for netboot, of course.
presently had only problems with fragmentation/reassembly of traffic[when most interfaces had different MTU/MRU basically].
aside lack of CPU power[to unleash ROS potential], focus on security, better power supply circuitry and unit and few other, kinda minor[for me]issues like sub-standard[non-Type-A]USB connector or lack of unusual[for casual networking user]feats and … oh wait 
p.s.
i guess someone may put untested[enough/on2011]boot-loader into 5.24.
and/or not make it mandatory to update DURING first reboot[dunno if ROS support that option, yet].
It should be nice to know wich is the best firmware (routerboard firmware) for the 2011.
I have ordered new boards and I dont want to destroy them. Here RMA is more expensive than buying new ones.
probably would make sense to wait for Final 6.0 RouterOS and use 5.22 until.
my 2011 fine with rc11 basically i unused feats/packages that had issues/troubles, presently.
I am not able to do netboot because It comes out with bad network connection
can you clarify what you mean by that? did you plug into the correct port (netinstall only works on ether1)?
yes
on console output it format flash then got stuck on BAD NETWORK CONNECTION and doesnt upload files
I changed PC, with a broadcom network card it worked and I recovered the router.
With Intel network card it doesnt work.
In the mean time I downgraded all my 2011 and routers to FW 2.41
I began having troubles with 3.x
in the past I upgraded downgraded everything with fw 2.41 without any issue
Deleted because not related.
Hello.
I already use DUDE to monitor network devices, thank you.
I always connect with latest winbox using IP addresses not MAC addr,
When new routerboot fw is available I put it on.
I began having problems updating RB2011 and some 750 with latest firmware 3.x, and these units died from 5.23 to 5.24
With older firmware 2.41 (I have loaeded them on all devices) I upgraded fw from the first releases of 5.x without any issue.