B, N and M all just randomly died on my 7510 keyboard. M is also the period. In short, I can no longer type things like ".com", "messaging.*", "sms.*", etc... not good at all since I'm using it as a "BoostBerry" primarily as an e-mail and internet device.
There are no apparent software or firmware issues along with this... it seems to be physical.
Has anyone had any luck cleaning or repairing bad keys?
Does anyone have a rough estimate as to what it would cost to replace the keyboard? I paid like 15 bucks for the 7510, so I'm assuming whatever the cost, it would make more sense to just get a replacement...