history
*************************************************
1st Day

I download all manual from http://www.routerboard.com and read it
I download all manual from http://www.mikrotik.com and read it

I setup the jumper to use a POE
I insert the ubiquity SR2 at 532A routerboard
I conect the 532A routerboard POE with a 9V adapter(i have)
I connect to the 532A with a null modem cable and is ok
I download from mikrotik routeros 2.9.4 upgrade files
I upgrade the 532A routerOS to 2.9.4 and is OK
I setup the 532A and is ok
I connect it to internet and is OK
I share internet over Ethernet ports and is ok

************** **************************
BUT

I try to setup my SR2 and isn't function
because the SR2 is NOT in a device list
I shutdown 532A
then i insert the sr2 in back side of 532A and turn on
532A is ok
but the SR2 is NOT in a device list

then i shutdown the 532A

I have used for two days OK but with out SR2
I read the manual again to try setup SR2 again

***************************************
3rd day
I try to turn on the 532A and is NOT OK
I check all cables and try again and is NOT OK
the routerboard is not OK

sometimes turn on and blue led lights on
but i cant connect to 532A with a null modem cable
the routerboard is not OK

and sometimes turn on and orange led lights on (not the blue)
but i cant connect to 532A with a null modem cable
the routerboard is not OK

what's wrong and what can i do ?

I am waiting for help,

Thank's for all

greetings from Mexico

You power adapter is definitely too low voltage! This will lead to instability, not booting, whatever error you can imagine

You have to use 12V at least, although only yesterday I had some funny issues with 12V, too. Try to use at least a 15-18V power adapter, and your problems will most probably go away!

Let us know how it goes!

Best regards,
Christian Meis

thanks Christian

i try to use a 12V adapter but
the 532A isn't function
sometimes the orange led is light on
but the 532A isn't function

i try to use a 18V adapter but
the 532A isn't function
sometimes the orange led is light on
but the 532A isn't turn on