RouterBoard just DEAD! Burnt capacitors?

RouterOS General
1

I was just using my RB 153 for a basic home router network (I know, very underated setup for a mikrotik RB). And suddenly it just stopped working… don’t turn on anymore.

I disassembled my enclosure and pulled the RB of. And so I first did a visual check in order to see some irregularities. I found this Capacitor C113 (near Power Source Jack) with a visible burn which apparently visually burned the board nearby it (as you can see in one attached picture).

There is also a second capacitor (apparently) burnt. This is the C112, nearby the previously mentioned C113.

I was using a 12V@2A DC power adapter (which is fine providing 11,86V).
By measuring both capacitor with DC power source connected, I have:
C113: variable DC range from 0,10V to 0,56V
C112: also variable DC ranged from 0,2 to 5,88V (peaks)

I couldn’t find any schematics neither documentation telling the respective capacitors capacitances. Where and how could I find these schematics?

Is that possible for these possible burnt capacitors preventing my routerBOARD from turning on?

I also tested PoE from ether1 with 24V PoE power adapter which also wasn’t able to bring the board ON!

Can somebody help me, please?!

2

If there is burnt caps then you got a power surge or a lightning hit.

I have had some of these cases with some wireless customers.

The board usually works for a few days and dies

3

Is there anything I could do to put it working again?


Thx

4

I’m not an electronics guy, but probably the color of the caps tells you what type they are. You could try finding some more and then getting out the soldering iron to remove the dead ones and replace them with new ones…

If soldering isn’t something you normally do, I’d recommend that you just buy a new board.