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kshogan
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RB751 2Hn Flashing LEDs - Work Around

Fri Aug 03, 2012 12:35 am

After going through about 100 RB751s and doing burn-in tests, we have seen a few go into that weird state of just flashing LEDs after power-up.

For some reason, plugging in a 24Vdc POE seems to clear the issue, and then subsequent powers with the barrel/wall wart power supply work just fine. Go Figure

Any ideas on what causes this?
 
rviteri
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Re: RB751 2Hn Flashing LEDs - Work Around

Fri Aug 03, 2012 5:53 pm

I've had a bad experience with these units. They hang randomly, I've sent the support files but mikrotik can't find the issue.
 
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normis
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Re: RB751 2Hn Flashing LEDs - Work Around

Mon Aug 06, 2012 8:57 am

If all LED lights flash at the same time, and changing the PSU fixes this issue - you better send the unit for replacement. PSU change is only a temporary fix, the hardware problem is still there, and your wireless will not work at full capacity. RMA is the only solution. Only devices from the very early first production batch could be affected with this issue.
No answer to your question? How to write posts
 
kau
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Re: RB751 2Hn Flashing LEDs - Work Around

Thu Mar 03, 2016 5:40 pm

Have the same issue with 751 , it was bricked years ago.
The same - just flashing with all leds.
Any way to restore/RMA it now?
Thanks! :D
 
kau
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Re: RB751 2Hn Flashing LEDs - Work Around

Mon Jul 04, 2016 2:38 am

If all LED lights flash at the same time, and changing the PSU fixes this issue - you better send the unit for replacement. PSU change is only a temporary fix, the hardware problem is still there, and your wireless will not work at full capacity. RMA is the only solution. Only devices from the very early first production batch could be affected with this issue.
Have the same issue with 751 , it was bricked years ago.
The same - just flashing with all leds. 
Any way to restore/RMA it now?
Thanks!

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