I lost my manual, just replaced the battery and forgot how to program my bike computer.

http://www.bellbikestuff.com/pdfs/111741WirelessManual.pdf

The manual says that it is uses a 3.0V/CR2032 battery.

Boy everyone needs to be more specific on their questions! If you mean you want to get into the BIOS but cannot because you forgot the password, I have never seen any program that will retrieve it for any computer. But not all is lost, you can reset it to factory defaults if your comfortable with electronics, you can open your computer and remove the CMOS BIOS battery and leave it out for 15 minutes (some computers will need a little more or a little less time but 15 minutes will usually be long enough for most of them) Replace the battery and close your computer. You should now have the original factory settings for your computer and the password should be gone.
NOTE: only do this if you know how you had all of the other settings, because it will revert to original factory settings and all BIOS modifications you had done will also be lost as well! Also removing the CMOS BIOS battery is not something that could be done by anyone, you must have a good understanding of electronics to properly do this action.

Simple search engines find things like this faster than waiting for Fixya experts to respond.

"sigma 506 manual"

Manuafacturers usually have the manuals. sigmasports.

It uses three AA batteries. The battery compartment is on the left side of the head.

You can download the manual from the manufacturer's web site at
http://www.vtechkids.com/_f/_pw/_manual/80-106400%20-%20Ride%20&%20Learn%20Giraffe%20Bike.pdf

The manual can be found on Sigma Sports Website.

Here is the manual in adobe pdf format for you to view and/or print.

http://planetbike.com/files/8001and2manual.pdf

Good Luck!

then you have to cut the lock off and by a new one with out the manual you really cant do anything.
sorry

The new and improved exercise bikes have what is called magnetic resistance. This is where your resitance is created by a magnet and some sort of power source such as batteries or your bike being plugged into a wall outlet. If you are using batteries replace them. I found that with my elyptical exerciser new batteries made a world of difference in the resistance settings. Make sure the batteries are strong ones. If changing the batteries doesn't help then there may be another problem. This could be the computer or a magnetic part. These parts are usually replaceable through the manufacturer. Just check your user manual and I am sure you can get it replaced. I hope this has been helpful.

how do i set up the remote to a tv? i lost my manual and i forgot how to do it

Forgot Windows 7 password?Lost admin password? Have been locked out of computer?
Lost computer login passwords, which is a common problem for the computer users. So there are many solutions. One of the popular solutions is as following,

1.log on a computer that is linked to Internet.
2. Download Windows Password Recovery Tool 3.0
3.Burn the downloaded .ISO file onto a blank CD
4.Insert newly created CD into the locked computer and then reboot it
5.select the account you wanna reset the password.