Turn on the wifi for the thinklpad T500 - IBM ThinkPad T23 2647 Notebook

Reactivating Deleted button functions. Not having a No Sale button is a useful feature to against theft.

https://www.google.com/search?q=PCR-T500+program+no+sale+button

..

I assume you mean PCR-T500. You press the receipt on/off button. You may have to press it twice

Reset could mean one of several things. I assume you know how to simply reboot it. If it is hung you can hold the power button down for about 6 seconds to turn it off.

If you forgot the password, contact Lenovo support at http://support.lenovo.com/en_US/
Provide them with proof of purchase and original receipt to prove ownership of laptop.

If you want to restore factory defaults then installed on the ThinkPad T500 is a program called Rescue and Recovery, which helps you diagnose and fix problems with the Windows operating system. To access this software, reboot your T500 and press the oval-shaped blue ThinkVantage button -- located on the upper-left area of your keyboard -- when the ThinkPad logo appears. When the Rescue and Recovery menu appears, choose the option that describes what you want to do. Follow the directions on the screen to run the appropriate action.

If you need the recovery disks then try
https://ez93.com/dl/lenovo-t500-restore-factory-settings.html

connect an external monitor to your laptop and check if you get display on the external monitor. if there is display than the issue is with the laptop monitor and you should replace the monitor screen, if the problem still remains the same when you connect the external monitor than it could be a software related issue. check and see if you get any display in BIOS mode. if you do then it could mean the OS is corrupted and you should reinstall the OS

Sony is fixing some of these cameras for free. Contact them to see if you qualify.

No the Amp must be on for it to function.

remove the power supply and battery then remove the memory module, clean the memory gold contacts. a regular pencil eraser will do. return the memory then the battery.

Looks like I forgot to mention that this happens even when the power cable is connected. The power indicator lamps just turn off and everything is "dead".

Error 7 is a Safety Key Error..
that's the red magnetic circular thingy on the console.
Simply secure the safety key in place and try it again

I was looking for a manual for my T500 as well and stumbled across this site:

http://www.allbrands.com/images2/common/MSK-588_Instructions.pdf

It is for the reliable brand but they are almost identical and it is better than nothing!