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jspool
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RB4011 Meltdown

Fri Aug 02, 2019 4:48 am

I installed a brand new RB4011 at a customer location. Later that same day I started getting alerts that the location was offline. I returned to the site today and the RB4011 was insanely hot and would not boot. It had a power led but no link lights on any port. It was plugged into a surge protected PDU and was powered with the OEM power supply. I opened the case to look for any visible issues and right away I noticed one of the RTL8367 Switch Chips had a meltdown! If I plug it back in it instantly starts cooking the RTL8367.

Anyone else ever encounter this?
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Elans
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Re: RB4011 Meltdown

Fri Aug 02, 2019 9:38 am

Based on photos, this looks like an overvoltage, however, without full inspection we are unable to provide any additional details, this is very specific case. Please write to support@mikrotik.com and refer to this post.
 
savage
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Re: RB4011 Meltdown

Fri Aug 02, 2019 2:49 pm

Seen this happen on other networking kits where power was supplied to Ethernet ports that should not be getting power yes.
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Chris
 
guipoletto
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Re: RB4011 Meltdown

Sat Aug 03, 2019 2:19 pm

Looks like lightning damage to Port4.
 
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jspool
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Re: RB4011 Meltdown

Wed Aug 07, 2019 6:43 pm

Looks like lightning damage to Port4.
In this case only port 1 and port 6 were used.
WAN=1
LAN=6

Mikrotik has instructed me to RMA so they can inspect it further. Replacement 4011 plugged in the exact same way and configured the same has been working flawlessly.

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