02-06-2011 11:56 PM
My old BEFSR41 ver.2 started acting flakey. Web pages took forever to load, sometimes couldn't connect to sites at all. All three computers on my home net acted the same way, until one of them started insisting that its LAN cable was disconnected, when it was not. Often I could not even access the router control panel.Then it started dropping the other two lines completely. For about 2 seconds, all three lights would go out, then come back on, and while they were out, I would get a msg that a Lan card was unplugged. When I connected my computer directly to the cable modem, all was well, so that let my ISP off the hook on the slow data delivery.
I decided that my venerable old Linksys had died of old age, but I held off chucking it in the recycle heap. Being retired from consumer electronic repairs, I was working on an electronic gadget on my workbench anyway, so I decided to try out a hunch. I wondered if something was wrong with the power supply causing it to supply lower voltage. I popped the case apart and quickly found the power supply section, right beside the power plug naturally. First test - the smell test. No magic smoke getting out detected. Next test - the finger probe.... looking for parts running hot. PAYDIRT! My finger brushed an electrolytic capacitor that was quite warm, and they are not supposed to get warm. This meant it was leaky, ie: leaking dc current and warming up in the process.
I took a voltage measurement and found it had +9.25 volts on its positive terminal. I unsoldered it, grabbed another 1000 uF at 16 volts out of the junk box and soldered it in. Measured 12vdc on its positve terminal. That was a good sign. Threw it back together and hooked it up and it's working like a champ.
The cap that went bad is designated C1 and is located right beside the 2W005 full wave bridge rectifier... ya can't miss it.
Hope this helps someone cause my fingers are tired.
02-07-2011 06:14 AM
I have a friend that has a BEFSR41 but it's still running fine. Will have to keep this one in mind.
Thank you for sharing this. Kudos to you!
04-09-2012 10:22 PM
Interesting.! I posted a message that my BEFSR81 was getting quite hot, but I put a fan on it and that's keeping it cool but still I have the router lockup and have to reboot (turn off and back on) the router.
I suggested that my router was dying a slow death....Looks like my router may have the same capacitor problem...but since I don't do electronic part replacements...I'll wait until someone responds to my question, then buy a new one.
One more piece of data to absorb. Thanks