problem RouterBOARD 751U-2HnD not boot after update

please help me iam upgrade my router board 751U-2HnD v5.11 but it dosn't work

led power and ehternet 2 is working but router dos't work
how can i fixed this problem

try reset router

i reset router but no respond
and i run netinstall but didn't find the router
the problem
i wrong update routerboard 751U-2HnD different software rb4xx
please help me how can i used netinstall to install the orignal sofware

rb400 software is identical to rb751 software, the files are the same.

do any LED lights blink or flash?

i used v3.2 but after ugrade the router didn't work
led power and led ethernet 2 is light

this device doesn't work with v3.2

use Netinstall + v5.11

how can i used net install?

http://wiki.mikrotik.com/wiki/Manual:Netinstall

To load from running Netinstall servwer, hold the front panel button during boot time, until LED turns off (not blinking, but turns off!), then release it to make the RouterBOARD look for Netinstall servers.

what do you mean the front panel button ?
the rest buttom

please help me

what do you mean the front panel button ?
are you mean the reset button

yes, reset button. there is only one button on the device. hard to miss

thankyou

I have a problem all led of my router are blinking and it don't work. what can I do ?

When the power RB751G-2HnD serial 2F7A0121FEFF / 148, Power LED flash and 1-5, with a frequency of 2 times per second.
What does this mean? And how to fix it?

Hi, I have the exact same thing: Power and 1-5 LEDs are flashing with a frequency of 2 times per second.
I also hear a subte clicl each time they flash. looks like an issue with initialisation of the router itself

Is there a known bug? I'm unable to get it to boot.

This started this PM while I wasnt even at home.

looks like this is a power supply failure...replaced it got it working fine... so the power supply failing after 3 days...

Beware, and please do not buy: This device power supply very bad, 8 device from 10 devices come with this problem! Dear MT! Please fix it!

Beware, and please do not buy: This device power supply very bad, 8 device from 10 devices come with this problem! Dear MT! Please fix it!

Please don't spread misinformation! This has nothing to do with power adapter. If you have some problems, email support.

i have never had any problems with MT product's power supplies. they are so far so good