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hex4
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rb750Gr3 keeps rebooting

Sat Jan 19, 2019 1:25 pm

hello

My Hex Router (RB750Gr3) is stuck in powering up loop , it keeps rebooting every 6 seconds

I checked power supply and it's fine.

I have tried to reset it but with no success.

Please help

thanks
 
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sebastia
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 1:48 pm

Hey

Quite unfortunate

Have you tried netinstall?
 
hex4
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 1:57 pm

it keeps rebooting every 6 seconds , don't think netinstall would work if the ports are reset every 6s.

I guess there is hardware failure. but need to be sure.
 
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sebastia
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 2:08 pm

Try don't assume...
 
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CZFan
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 3:00 pm

Had this before on a 951G when I did an update wrong, late, on a Friday afternoon :-(

Netinstall saved me :-)
 
hex4
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 3:09 pm

ok , tried Netinstall , guess what , nothing ... any other suggestions ?
 
hex4
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 3:11 pm

it worked last night fine ,

this morning it's stuck on powering up loop,

there was no update or anything.

hw fault ?
 
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mkx
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 3:23 pm

I checked power supply and it's fine.

How did you check the power supply?
 
hex4
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 4:36 pm

multi meter and I have a few spare ones as I have few more mikrotik devices.
 
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mkx
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 6:24 pm

Under load?
 
hex4
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Re: rb750Gr3 keeps rebooting

Sat Jan 19, 2019 10:13 pm

I have checked just voltage with multimeter to see if the PSU is not dead , then I used other PSU from different Routerboard with same result.
 
hex4
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Re: rb750Gr3 keeps rebooting

Sun Jan 20, 2019 1:37 am

update : I was playing with the Netinstall and .... it's working now :) just need to find what was happened.

thanks for the suggestion
 
ukitnam
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Re: rb750Gr3 keeps rebooting

Sun Jan 20, 2019 5:37 am

Try don't assume...
just wanted to repost this since you already have solved the problem. :D
 
hex4
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Re: rb750Gr3 keeps rebooting

Sun Jan 20, 2019 1:39 pm

few notes which can be helpful for someone with same issue ....

https://wiki.mikrotik.com/wiki/Manual:Reset_button

Starting the RouterBOARD in Netinstall mode
Or Keep holding the button for 5 more seconds until until LED turns off, then release it to make the RouterBOARD look for Netinstall servers. You can also simply keep the button pressed until the device shows up in the Netinstall program on Windows (total 15 seconds)

then

https://wiki.mikrotik.com/wiki/Manual:Netinstall
 
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anav
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Re: rb750Gr3 keeps rebooting

Sun Jan 20, 2019 8:45 pm

Thanks for the update and links, netinstall is not as easy the first time around and glad you found your way!
My issue was trying to connect to hard to get CapACs for netinstall and not knowing what the heck I was doing the first time.
 
MasteRTriX
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Re: rb750Gr3 keeps rebooting

Thu Nov 21, 2019 11:14 pm

Hi, today I upgraded routeros from 6.45.5 to 6.45.7 and router entered in a boot loop.
I tried netinstalling back to 6.45.5, 6.40.8, 6.42.12, 6.43.16, 6.44.3 and every time it flashes correctly but goes back to bootloop.

Tried also other working power supplies with no luck

Thanks in advance for any help you can provide

Edit: tried latest 6 beta and even 7 with same results. Flashed ok with netinstal but afterwards boot loop. I´m beggining to think the initial upgrade bricked it somehow, and netinstall doesn´t really do a 100% clean install.
 
gargola
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Re: rb750Gr3 keeps rebooting

Mon Mar 30, 2020 12:56 am

Hi @MasteRTriX

Did you find any solution? I have an RB750UPr2 that Netinstall says it worked and reboot the router, but after rebooting it, it gets again in the rebooting loop, within netinstall it can stay on for hours, so no problem there.

I have tried with 6.45.6 6.45.8 and 6.4 (i think that was their firmware before getting in to this)

Best regards.
Hi, today I upgraded routeros from 6.45.5 to 6.45.7 and router entered in a boot loop.
I tried netinstalling back to 6.45.5, 6.40.8, 6.42.12, 6.43.16, 6.44.3 and every time it flashes correctly but goes back to bootloop.

Tried also other working power supplies with no luck

Thanks in advance for any help you can provide

Edit: tried latest 6 beta and even 7 with same results. Flashed ok with netinstal but afterwards boot loop. I´m beggining to think the initial upgrade bricked it somehow, and netinstall doesn´t really do a 100% clean install.

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