Hi KostaGe,
Sorry to hear that you are facing such kind of problem..But solution is not soo far.
As far as i understand is that when you TURN ON your client computer you find your printer is not TURNED ON.
Please let me know how many computer's are connected to this same product (
Brother MFC-8500) and don't forget to change the desired SLEEP MODE time according to your requirement.
1. Please click on Start-Devices and Printers-Right Click on your product(
Brother MFC-8500) and click OPEN, then locate to firt TAB in that same windows which will popup after clicking on OPEN (Remove CHECK if it is there on USE PRINTER OFFLINE).
2. Everytime use Full Drivers for installation which gives you more options and a great compatibility/stability with that particular computer.(As i have checked on US and UK Office pages there are no drivers for windows 7) (Keep in mind to check SLEEP MODE settings).
3. Here is a way to check what is that exact IP Address and Other very useful information to get.
VIA THE PRINTER FRONT PANEL:Single Line LCD Printers:
Press the '+' key until you see "INFORMATION"
Press the 'SET' key
Use the '+' or '-' keys until you see "PRINT SETTINGS"
Press the 'SET' key and the print configuration pages are printed.
Two Line LCD Printers:
Press the '+' key until you see "MENU" "INFORMATION"
Press the 'SET' key
Use the '+' or '-' keys until you see "INFORMATION" "PRINT SETTINGS"
Press the 'SET' key and the print configuration pages are printed.
Once you get the IP Address of your product (
Brother MFC-8500). Open the web browser and search for it. You can see Printer Web Settings Page where you can do some settings if they are not matching what you were looking for OR might be differ from your specific known network.
4. Finally, if you did not get any help after trying these options, then try to change the security of your network, password, Channels, Encryption, Wireless Mode (b,g,n).
I Hope these information are enough to give you the possible solution.