One of my RB450 went down yesterday evening because of two on-board capacitors which exploded (6.3V 660 uF) - hope that I was able to read values correctly, their cases ware to damaged. It look like a very cheep bad quality parts. I thing that RBs deserve more reliable parts. Luckily I have soldering station by the hand and two Caps (6.3V 1000uF), so I was able to replace them and RB works fine again. Otherwise network down time could be much more longer, because there was no spare router.
This was already explained in the past, that there was a small number of defective capacitors in RB450, we quickly changed the supplier and there are no more problems in new products. If you have one of the defective models, please return the device to RMA or replace the caps if that is easier for you.
Oh, such a quick response. Good to know. But now I have two brand new RB450 on my desk. I have bought them this morning, hour ago. I it seems that vendor of caps is also Su’scon, same as in the broken caps case.
Sir, I beg to differ. Last week one of mine RB750Gs went down with a bad case of leaked capacitor 
. I would gladly pay one or two euros more for high quality caps rather than suffer unpleasant downtime and pissed-off customers.
the manufacturer is the same, but the supplier is different. the problematic caps had fake caps mixed in with the authentic ones. new shipments are all good ones.
this could happen also because of other reasons. send the RB750G to RMA. also, RB750G is already discontinued, ie. it’s an old product. Maybe it was made during the same time as the original posters RB450
My RB450G was bought in 05.2009. RMA Guarantee has passed, luckily replacing of caps fix it 
also the Suscon model should be different, is the lettering not different on the old and new ones?
My broken caps ware green. I’ll try to read lettering in the evening. Hope it is still readable.
So far, in the past 2 months, I’ve had a dozen 450gs, 3 433ahs, and 2 411ars die by this.
I could care less about the 5 minutes of soldering or the 60 cents for replacement caps, it’s the drive time and customer dissatisfaction.
Solid routers. As long as the caps hold out. Would be at less than 1% failure rate over 2 years. But I’m over 5% at this point.
Go figure. Almost every one of them went out 2-3 months out of warranty.
I had a different thread going about my dozen or more 411ah’s that have failed. They all have the green capacitors that now have the tops swollen. (6.3V 660 uF. I noticed the new boards have black capacitors that are 680uf, and have one less. (the one on the side opposite the pair)
Can someone give me a suitable part number so I can get some and replace. I haven’t located the exact ones and I’m not sure which numbers are critical, i.e. 6.3v, etc.
Thanks
I just had 2 complete lockups on my RB750G. Maybe the same issue. I’ll likely see it soon.
I have 5 RB 411AH routerboards all died within a few weeks of each other. Same deal swollen caps. All five boards were purchased a liitle over a year ago and put into service at the same time. Now I have to pay a tower climber to replace boards that should not be failing. Also I thought the cap problem in the 450 was some time ago, seems like if these are just now failing after being produced 1 year ago that who knows what boards can be trusted and which ones cannot. Will I have the same problem with the new boards I purchased last week to replace them a year from now???
Hate to have to post here, but the cap issue is far greater then they are letting on..
On my desk, I have over 20 411’s 2 411ah’s, and my techs have at least another 4-5 each
in their trucks..
This is costing me a fortune in board swaps, and truck rolls..
And I know we have already thrown away a bunch of them.. Now we are having to
spend $$ to get the caps replaced, and cross our fingers they run after that.
R
A little more clarification. The old device batches had Suscon SJ series capacitors, the new ones have Suscon MG capacitors, with more guaranteed lifetime and higher quality as well. If you will replace them, use the MG series.
Us too are having more problems with capacitors. First, we had problems only with RB450/G series, and now we have problems with 411, 433, 750/G etc etc…
We also have noticed we have more and more malfunctional routerboards.
It is not a problem replacing a bad capacitor, but the problem is the downtime for our clients.
We are also having problems with 411 boards. 4 failed in the last 2 weeks. 3 bulging Suscon SJ Capacitors on the board when it happens. Green in color with Gold markings. Arrgh, I just installed 45 of these boards… all require bucket truck rolls.
I’ve been replacing the caps during spare time in evenings. some of the boards had been in use for a long time. Can’t help but to believe that it is temp related, as we’ve had a month of 100+ degree days, which we didn’t have last summer.
Hi,
We seem to be also having problems with RB750 units that seem to have ceramic type capacitors.
Can these also be the problem with routers locking up - the symptoms are identical to the RB750 with the Suscon SJ parts? If so, can these be replaced as to RMA these is not worth it for us and does not give a good impression to our end users, especially since we still have the backup/restore issue to new hardware.
Rgds,
Mark.
I have not seen this issues on any of our 750g/l and 450g. Is there a guide on how to replace them somewhere ? Could be useful in the future.