MikroTik has found that a small number of RB800 devices that we have sold (less than 10%) have a problem where the device can stop working at ambient temperatures over 60C.
If you have not seen any heat related problems that you can repeat, you do not have one of the affected devices.
Customers are asked to return their problematic device to the seller (distributor) for an immediate exchange. . Distributors will receive new devices after they submit a list to MikroTik.
However, if the exchange is not possible, or you need the device sooner, you can fix it yourself by soldering. You will need a trained soldering expert with lots of experience and professional equipment. If you will follow the guide exactly, your warranty will not be void. Again, only TRAINED EXPERTS should follow this guide if they choose to. Normally, you need to contact your distributor for a replacement.
The attached PDF document explains two possible solutions. rb800-heatfix.pdf (1.29 MB)
Sorry but there is absolutely no way to identify the possibly troublesome devices. As I said, the number is quite small, so you shouldn’t worry about them unless client reports issues. Even if the client has received an affected device, it still takes extraordinary conditions (65C+) to see the issue.
I live in a very cold place on earth, even here the outside temperature is 30°C. I don’t believe that the outside temperature is higher in my country than yours. Not a chance that the temperature inside your box is only 30°C without active cooling.
we have active cooling and electronic monitoring inside and outside the box so when i tell you what the temp is i know what i am talking about
we are talking here about the same cards that worked on the rb600 with no problem and when fitted to the rb800 there is a problem
now mikrotik has admitted their is a hardware problem at 65 deg c but i believe the problem happens at about 22 - 30 deg c
i have spoken to other people in my country and they all have the same problem we have with the rb800
I don’t say that you are lying, but it sounded strange that the temperature inside your box was only 30°C. I know it’s very hot in your contry, so you probably have some kind of enclosure air conditioner to keep the temperature down.
Sorry, but as far as i can see you can find out who is right and who is wrong by simple removing 1 resistor (if extensions boards will not be used).
If problem remains then you can always put it back.
temperature in the box, temperature on CPU, temperature on Wireless cards, are different values, only exception is when box have ideal airflow within the box (and it is not the same as ventilation). So 30C in box doesn’t mean that there are no parts with 60C etc.
This may be an issue we are experiencing. However, the only place we’ve been able to find a temp is under System > Resource > Heath > CPU Temp in Winbox. Is there a place to view or monitor the System Temp or something or is everyone just monitoring the temp inside the box by third party means?
And @normis is their a newsletter we can subscribe to to get advisories like this and/or RouterOS version updates, etc.?
You distributor should be willing to replace your affected device. If not, chances are you guarantee timeframe is over anyway.
However, you do have a very good, very valid point.
What happens if the vendor says they will not replace it, and any warranty on the device is discontinued if this modification is made per MikroTik, who is responsible for replacing the board in the event the repair goes wrong or normal malfunction later down the road? Had MikroTik not had a defect in the product, neither of these two situations would arise.
