Please advise me as to the procedure for replacing a CMOS battery on a 3750. I have searched for videos and documentation on this but have not found anything useful. I'd also like to know the level of difficulty as I will be advising a customer on the phone on how to do it themselves.
First why you think that batter issue? what kind of Logs do you see on the Logs? before you open the kit.
see the document warning :
you can find the video of what is inside :
Thank you for the video and the explosion warning. I will warn the customer that they could explode if they try this. I didn't see where the CMOS battery is exactly in the photo. I'm sure it's a CMOS battery problem as when the switch loses power due to a power outage, the clock resets to 1993.
on a side note, I think Cisco changed their TAC policy on replacing Lithium batteries a few years ago (see link below). Basically what it comes down to is that it is more expensive to ship them then to buy them yourself.
That said, I don't see the battery on the 3750 motherboard myself right away. I think it is usually similar to the round CRC2032 batteries...