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Just a heads up after all theses years, my LB4M is still running strong 24/7 with this mod on the same original PSU that came with it when I got in in 2013-2014 on ebay. I forgot to answer the post, but I used a null modem cable (looks like a RJ45 plug to Serial. It's a pale blue one if it help...

Both fan are directly connected on the mainboard where the 3 litlle fan were. As I am using this switch for home usage, I needed it to be way quieter than it was stock. They are slim fan @1600 RPM bought on NCIX for about 10$ in rebate, and the grill were 5$ each I beleive. Nice project to do...

I bought this LB4M and it was working fine until few days ago. I was trying some of the features such as vlan or port channel, and uppon a casual reboot, I locked myself out of the switch.. The switch isn't pulling any DHCP address from the server (which is working 100% fine) and I can't connect...