Keyboard not working on Lenovo Laptop

[xiang2011]

Hi there. I'm experiencing problems with a Lenovo Laptop. I cannot log into Windows because the Lenovo 3000-F31 F31A F31G series laptop keyboard is not functioning as normal. The 'H' button is operating as a backspace for example and because I cannot see what I'm typing in the password bar, I don't know which keys are what. Only some keys produce characters and when typing other keys the system just beeps. I had this problem yesterday and I fixed it by holding the FN button and F4 or F7, I think it was F7 but now the same combination isn't working. If you could help me it'd be great. Cheers. .