My computer screen is blank on computer. have logitech ex110

SOURCE: logitech ex110 keyboard stopped working all of a sudden

First make sure the receiver is plugged into the computer. Second make sure you have fresh batteries in the keyboard and they are installed in the correct orientation. Then try the following:

1. Press the Connect button on the receiver. The receiver's LEDs will go into a sequential flashing to indicate that the receiver is ready to accept a connection.

2. Press the Connect button on the bottom of the keyboard. The receiver's LEDs will now stop flashing sequentially. Then all the LEDs go off briefly, then they will all flash once before returning to the state it was in before the connect button was pressed.

3. Your keyboard should now be connected to the receiver.

This article should also be of help:
http://logitech-en-amr.custhelp.com/cgi-bin/logitech_en_amr.cfg/php/enduser/
std_adp.php?p_faqid=8121

Please let me know if this works and rate my response.

Thanks.

SOURCE: logitech ex 100 mouse doesn't work

Normal 0 Turn the mouse over and find the small rest/connect button on the bottom of the mouse and press it to Reset/Connect the mouse to the receiver and work properly.
If not, try pressing the receiver button and then press the mouse. This should be done whenever you change batteries or glitch.
Hope this helps you. Bud

SOURCE: Wireless EX110 Logitech mouse not connecting.

Try the mouse on a different computer. If it can't work on there then you may have a defective mouse. Contact logitech about warranty info.

SOURCE: Logitech wireless keyboard and mouse (ex 100) won't connect

use the secured keyboard connection you have to push a combination of keys then a 16 digit code but then your keyboard should work

SOURCE: My cordless wave mouse not working red and green light goes mad.

i have the same problem